Refine docker-compose.yml: (#799)

* Refine docker-compose.yml:

1. use short volume bind syntax.
2. fix postgres volume issue.
   check #798
3. Add POSTGRES_DB env for clarify.
   check luckyframework/lucky#1791
4. Add crystal build cache into volume for better performance.

* Refine dev_entrypoint.sh

* Add shards cache as volume

* Add app/bin into volume for isolation the binaries created from container with locals.

src/web_app_skeleton/docker-compose.yml

@@ -1,4 +1,4 @@
-version: '3.8'
+version: "3.8"
 services:
   lucky:
     build:
@@ -8,15 +8,11 @@ services:
       DATABASE_URL: postgres://lucky:password@postgres:5432/lucky
       DEV_HOST: "0.0.0.0"
     volumes:
-      - type: bind
-        source: .
-        target: /app
-      - type: volume
-        source: node_modules
-        target: /app/node_modules
-      - type: volume
-        source: shards_lib
-        target: /app/lib
+      - .:/app
+      - node_modules:/app/node_modules
+      - shards_lib:/app/lib
+      - app_bin:/app/bin
+      - build_cache:/root/.cache
     depends_on:
       - postgres
     ports:
@@ -30,10 +26,9 @@ services:
     environment:
       POSTGRES_USER: lucky
       POSTGRES_PASSWORD: password
+      POSTGRES_DB: lucky
     volumes:
-      - type: volume
-        source: postgres_data
-        target: /var/lib/postgresql
+      - postgres_data:/var/lib/postgresql/data
     ports:
       # The postgres database container is exposed on the host at port 6543 to
       # allow connecting directly to it with postgres clients. The port differs
@@ -46,3 +41,5 @@ volumes:
   postgres_data:
   node_modules:
   shards_lib:
+  app_bin:
+  build_cache:

src/web_app_skeleton/docker/dev_entrypoint.sh.ecr

@@ -24,25 +24,25 @@ case ${1:-} in
 esac
 
 if ! [ -d bin ] ; then
-  echo "Creating bin directory"
+  echo 'Creating bin directory'
   mkdir bin
 fi
 <%- if browser? -%>
-echo "Installing npm packages..."
+echo 'Installing npm packages...'
 yarn install
 <%- end -%>
 if ! shards check ; then
-  echo "Installing shards..."
+  echo 'Installing shards...'
   shards install
 fi
 
-echo "Waiting for postgres to be available..."
+echo 'Waiting for postgres to be available...'
 ./docker/wait-for-it.sh -q postgres:5432
 
 if ! psql -d "$DATABASE_URL" -c '\d migrations' > /dev/null ; then
-  echo "Finishing database setup..."
+  echo 'Finishing database setup...'
   lucky db.migrate
 fi
 
-echo "Starting lucky dev server..."
+echo 'Starting lucky dev server...'
 exec lucky dev