diff --git a/Dockerfile b/Dockerfile
index ee0313a76..e569d8dff 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -41,13 +41,13 @@ EXPOSE 3000
 CMD ["./bin/rails", "server", "-b", "0.0.0.0"]
 
 FROM base AS precompile
-RUN bundle config set with assets
 RUN bundle config set deployment true
 RUN bundle install --jobs 4
 RUN RAILS_GROUPS=assets bundle exec rake assets:precompile
 
 # Build the environment-specific stuff
 FROM base AS production
+RUN bundle config set without assets
 RUN bundle config --global frozen 1
 RUN bundle install --jobs 4
 COPY --from=precompile /app/public/assets /app/public/assets
@@ -56,10 +56,11 @@ FROM base AS test
 COPY test /app/test/
 # For testing the API client
 COPY doc /app/doc/
-RUN bundle config set with development test assets
+RUN bundle config set without assets
+RUN bundle config set with development test
 RUN bundle config --global frozen 1
 RUN bundle install --jobs 4
-RUN RAILS_GROUPS=assets bundle exec rake assets:precompile
+COPY --from=precompile /app/public/assets /app/public/assets
 
 FROM base AS development
 RUN bundle config set with development test
diff --git a/Gemfile b/Gemfile
index a5ea9dd1a..6cb7fadae 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,19 +3,11 @@ source 'https://rubygems.org'
 gem 'actionpack-xml_parser', '~> 2.0'
 gem 'activemodel-serializers-xml', '~> 1.0.1'
 
-gem 'coffee-rails', '~> 5.0.0'
-
-gem 'jquery-rails', '~> 4.6'
-gem 'jquery-ui-rails', '~>7.0.0'
-
 gem 'rails', '~> 6.1'
-gem 'sassc-rails', '~> 2.1.2'
 
-gem 'bootstrap-sass', '3.4.1'
 gem 'font-awesome-sass', '~> 6.5.2'
-
-gem 'uglifier', '>=1.3.0'
-
+gem 'jquery-rails', '~> 4.6'
+gem 'jquery-ui-rails', '~>7.0.0'
 gem 'aasm', '~> 5.5.0'
 gem 'acts_as_list'
 gem 'bcrypt', '~> 3.1.20'
@@ -33,7 +25,14 @@ gem 'sqlite3', '~> 1.4', group: :sqlite
 gem 'mysql2', '~> 0.5', group: :mysql
 gem 'pg', '~> 1.1', group: :postgresql
 
-group :assets, :optional => true do
+# See https://github.com/sstephenson/execjs#readme for more supported runtimes
+gem 'mini_racer', group: :therubyracer
+
+group :assets do
+  gem 'coffee-rails', '~> 5.0.0'
+  gem 'sassc-rails', '~> 2.1.2'
+  gem 'bootstrap-sass', '3.4.1'
+  gem 'uglifier', '>=1.3.0'
   gem 'listen'
   gem 'tolk', '~> 5.0.1'
 end
@@ -52,7 +51,6 @@ end
 group :development, :test, :optional => true do
   gem 'byebug'
   gem 'rubocop', '~> 1.65'
-  gem 'mini_racer'
 end
 
 group :test, :optional => true do
diff --git a/db/schema.rb b/db/schema.rb
index a0b9a2518..6e2fb9c3d 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -2,30 +2,33 @@
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.
 #
-# Note that this schema.rb definition is the authoritative source for your
-# database schema. If you need to create the application database on another
-# system, you should be using db:schema:load, not running all the migrations
-# from scratch. The latter is a flawed and unsustainable approach (the more migrations
-# you'll amass, the slower it'll run and the greater likelihood for issues).
+# This file is the source Rails uses to define your schema when running `bin/rails
+# db:schema:load`. When creating a new database, `bin/rails db:schema:load` tends to
+# be faster and is potentially less error prone than running all of your
+# migrations from scratch. Old migrations may fail to apply correctly if those
+# migrations use external dependencies or application code.
 #
 # It's strongly recommended that you check this file into your version control system.
 
 ActiveRecord::Schema.define(version: 2020_08_20_000743) do
 
-  create_table "attachments", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
-    t.integer "todo_id"
+  # These are extensions that must be enabled in order to support this database
+  enable_extension "plpgsql"
+
+  create_table "attachments", force: :cascade do |t|
+    t.bigint "todo_id"
     t.string "file_file_name"
     t.string "file_content_type"
-    t.integer "file_file_size"
+    t.bigint "file_file_size"
     t.datetime "file_updated_at"
-    t.datetime "created_at"
-    t.datetime "updated_at"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
     t.index ["todo_id"], name: "index_attachments_on_todo_id"
   end
 
-  create_table "contexts", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "contexts", force: :cascade do |t|
     t.string "name", null: false
-    t.integer "position", default: 0
+    t.integer "position"
     t.integer "user_id", default: 1
     t.datetime "created_at"
     t.datetime "updated_at"
@@ -34,7 +37,7 @@
     t.index ["user_id"], name: "index_contexts_on_user_id"
   end
 
-  create_table "dependencies", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "dependencies", force: :cascade do |t|
     t.integer "successor_id", null: false
     t.integer "predecessor_id", null: false
     t.string "relationship_type"
@@ -42,7 +45,7 @@
     t.index ["successor_id"], name: "index_dependencies_on_successor_id"
   end
 
-  create_table "notes", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "notes", force: :cascade do |t|
     t.integer "user_id", null: false
     t.integer "project_id", null: false
     t.text "body"
@@ -52,7 +55,7 @@
     t.index ["user_id"], name: "index_notes_on_user_id"
   end
 
-  create_table "open_id_authentication_associations", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "open_id_authentication_associations", force: :cascade do |t|
     t.integer "issued"
     t.integer "lifetime"
     t.string "handle"
@@ -61,13 +64,13 @@
     t.binary "secret"
   end
 
-  create_table "open_id_authentication_nonces", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "open_id_authentication_nonces", force: :cascade do |t|
     t.integer "timestamp", null: false
     t.string "server_url"
     t.string "salt", null: false
   end
 
-  create_table "preferences", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "preferences", force: :cascade do |t|
     t.integer "user_id", null: false
     t.string "date_format", limit: 40, default: "%d/%m/%Y", null: false
     t.integer "week_starts", default: 0, null: false
@@ -79,9 +82,9 @@
     t.integer "refresh", default: 0, null: false
     t.boolean "verbose_action_descriptors", default: false, null: false
     t.boolean "show_hidden_projects_in_sidebar", default: true, null: false
-    t.string "time_zone", default: "London", null: false
+    t.string "time_zone", limit: 255, default: "London", null: false
     t.boolean "show_project_on_todo_done", default: false, null: false
-    t.string "title_date_format", default: "%A, %d %B %Y", null: false
+    t.string "title_date_format", limit: 255, default: "%A, %d %B %Y", null: false
     t.integer "mobile_todos_per_page", default: 6, null: false
     t.string "sms_email"
     t.integer "sms_context_id"
@@ -91,11 +94,11 @@
     t.index ["user_id"], name: "index_preferences_on_user_id"
   end
 
-  create_table "projects", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "projects", force: :cascade do |t|
     t.string "name", null: false
-    t.integer "position", default: 0
+    t.integer "position"
     t.integer "user_id", default: 1
-    t.text "description", limit: 16777215
+    t.text "description"
     t.string "state", limit: 20, null: false
     t.datetime "created_at"
     t.datetime "updated_at"
@@ -109,12 +112,12 @@
     t.index ["user_id"], name: "index_projects_on_user_id"
   end
 
-  create_table "recurring_todos", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "recurring_todos", force: :cascade do |t|
     t.integer "user_id", default: 1
     t.integer "context_id", null: false
     t.integer "project_id"
     t.string "description", null: false
-    t.text "notes", limit: 16777215
+    t.text "notes"
     t.string "state", limit: 20, null: false
     t.datetime "start_from"
     t.string "ends_on"
@@ -133,21 +136,21 @@
     t.integer "every_count"
     t.integer "weekday"
     t.datetime "completed_at"
-    t.datetime "created_at"
-    t.datetime "updated_at"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
     t.boolean "show_always"
     t.index ["state"], name: "index_recurring_todos_on_state"
     t.index ["user_id"], name: "index_recurring_todos_on_user_id"
   end
 
-  create_table "sessions", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "sessions", force: :cascade do |t|
     t.string "session_id"
     t.text "data"
     t.datetime "updated_at"
-    t.index ["session_id"], name: "sessions_session_id_index"
+    t.index ["session_id"], name: "index_sessions_on_session_id"
   end
 
-  create_table "taggings", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "taggings", force: :cascade do |t|
     t.integer "taggable_id"
     t.integer "tag_id"
     t.string "taggable_type"
@@ -156,7 +159,7 @@
     t.index ["taggable_id", "taggable_type"], name: "index_taggings_on_taggable_id_and_taggable_type"
   end
 
-  create_table "tags", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "tags", force: :cascade do |t|
     t.string "name"
     t.datetime "created_at"
     t.datetime "updated_at"
@@ -164,11 +167,11 @@
     t.index ["name"], name: "index_tags_on_name"
   end
 
-  create_table "todos", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "todos", force: :cascade do |t|
     t.integer "context_id", null: false
     t.integer "project_id"
     t.text "description", null: false
-    t.text "notes", limit: 16777215
+    t.text "notes"
     t.datetime "created_at"
     t.datetime "due"
     t.datetime "completed_at"
@@ -177,7 +180,6 @@
     t.string "state", limit: 20, null: false
     t.integer "recurring_todo_id"
     t.datetime "updated_at"
-    t.text "rendered_notes", limit: 16777215
     t.index ["context_id"], name: "index_todos_on_context_id"
     t.index ["project_id"], name: "index_todos_on_project_id"
     t.index ["state"], name: "index_todos_on_state"
@@ -186,20 +188,20 @@
     t.index ["user_id", "state"], name: "index_todos_on_user_id_and_state"
   end
 
-  create_table "tolk_locales", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "tolk_locales", force: :cascade do |t|
     t.string "name"
     t.datetime "created_at"
     t.datetime "updated_at"
     t.index ["name"], name: "index_tolk_locales_on_name", unique: true
   end
 
-  create_table "tolk_phrases", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "tolk_phrases", force: :cascade do |t|
     t.text "key"
     t.datetime "created_at"
     t.datetime "updated_at"
   end
 
-  create_table "tolk_translations", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "tolk_translations", force: :cascade do |t|
     t.integer "phrase_id"
     t.integer "locale_id"
     t.text "text"
@@ -210,9 +212,9 @@
     t.index ["phrase_id", "locale_id"], name: "index_tolk_translations_on_phrase_id_and_locale_id", unique: true
   end
 
-  create_table "users", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "users", force: :cascade do |t|
     t.string "login", limit: 80, null: false
-    t.string "crypted_password", limit: 60
+    t.string "crypted_password", limit: 60, null: false
     t.string "token"
     t.boolean "is_admin", default: false, null: false
     t.string "first_name"
diff --git a/doc/installation.md b/doc/installation.md
index 375997e86..2e937f639 100644
--- a/doc/installation.md
+++ b/doc/installation.md
@@ -44,7 +44,7 @@ Tracks container. In future there should be an official image in Docker Hub. You
 1. Get the Tracks code base by either downloading the archive file for the latest releast or cloning it from GitHub.
 2. Run the following command in the Tracks directory to build the image:
 ```
-   $ docker build -t="tracks" .
+   $ docker build -t="tracks" --target=production .
 ```
 
 1. Make sure you have Docker properly installed.
@@ -153,13 +153,22 @@ Tracks is built upon a number of Ruby libraries (known as ‘gems’). The Bundl
   * If you are using SQLite:
 
         ```
-        bundle install --without "development test mysql"
+        bundle config set without mysql postgresql
+        bundle install
         ```
 
   * If you are using MySQL:
 
         ```
-        bundle install --without "development test sqlite"
+        bundle config set without sqlite postgresql
+        bundle install
+        ```
+  
+  * If you are using PostgreSQL:
+
+        ```
+        bundle config set without sqlite mysql
+        bundle install
         ```
 
   * If you are installing Tracks on Windows or Mac OS X, or if you have another JavaScript runtime such as Node.js installed, you may also append `therubyracer` as an additional "without" parameter.
diff --git a/test-envs/docker-compose-mysql.yml b/test-envs/docker-compose-mysql.yml
index 6982fe3a3..002f5b9ef 100644
--- a/test-envs/docker-compose-mysql.yml
+++ b/test-envs/docker-compose-mysql.yml
@@ -5,8 +5,6 @@ services:
     environment:
       MYSQL_ALLOW_EMPTY_PASSWORD: 1
       MYSQL_DATABASE: ${TRACKS_DB:-tracks}
-    volumes:
-      - db-data:/var/lib/mysql
   web:
     build:
       context: ..
@@ -20,12 +18,9 @@ services:
       DATABASE_USERNAME: root
       DATABASE_PASSWORD_EMPTY: 1
     volumes:
-      - ${VOLUME:-..}:/app:Z
       - ${VOLUME:-..}/config/database.docker.yml:/app/config/database.yml:Z
       - ${VOLUME:-..}/config/site.docker.yml:/app/config/site.yml:Z
     ports:
       - 3000:3000
     depends_on:
       - db
-volumes:
-  db-data:
diff --git a/test-envs/docker-compose-postgres.yml b/test-envs/docker-compose-postgres.yml
index 378d30cf8..52ba2945c 100644
--- a/test-envs/docker-compose-postgres.yml
+++ b/test-envs/docker-compose-postgres.yml
@@ -5,8 +5,6 @@ services:
     environment:
       POSTGRES_DB: ${DATABASE_NAME:-tracks}
       POSTGRES_PASSWORD: password
-    volumes:
-      - db-data:/var/lib/postgresql/data
   web:
     build:
       context: ..
@@ -23,12 +21,9 @@ services:
       DATABASE_ENCODING: unicode
       DATABASE_PORT: 5432
     volumes:
-      - ${VOLUME:-..}:/app:Z
       - ${VOLUME:-..}/config/database.docker.yml:/app/config/database.yml:Z
       - ${VOLUME:-..}/config/site.docker.yml:/app/config/site.yml:Z
     ports:
       - 3000:3000
     depends_on:
       - db
-volumes:
-  db-data:
diff --git a/test-envs/docker-compose-sqlite.yml b/test-envs/docker-compose-sqlite.yml
index 374ff3eb9..7a04620ce 100644
--- a/test-envs/docker-compose-sqlite.yml
+++ b/test-envs/docker-compose-sqlite.yml
@@ -12,7 +12,7 @@ services:
       DATABASE_NAME: "/app/db/db.sqlite"
       DATABASE_TYPE: sqlite3
     volumes:
-      - ${VOLUME:-sqlite}:/app/db:Z
+      - sqlite:/app/db:Z
       - ${VOLUME:-..}/config/database.docker.yml:/app/config/database.yml:Z
       - ${VOLUME:-..}/config/site.docker.yml:/app/config/site.yml:Z
     ports: