🐳 Add docker in Development

.dockerignore

@@ -0,0 +1,6 @@
+.git
+Gemfile.lock
+Dockerfile
+docker-compose.yml
+*.gem
+deploy

Dockerfile

@@ -0,0 +1,8 @@
+FROM ruby:2.5
+
+WORKDIR /app
+
+COPY . ./
+RUN bundle install
+
+CMD ["bin/console"]

README.md

@@ -175,6 +175,64 @@ For more information, refer to [website](http://narkoz.github.io/gitlab).
 
 ## Development
 
+### With a dockerized Gitlab instance
+
+```shell
+docker-compose up -d gitlab # Will start the gitlab instance in the background (approx. 3 minutes)
+```
+
+After a while, your Gitlab instance will be accessible on http://localhost:3000.
+
+Once you have set your new root password, you can login with the root user.
+
+You can now setup a personal access token here: http://localhost:3000/profile/personal_access_tokens
+
+Once you have your token, set the variables to the correct values in the `docker.env` file.
+
+Then, launch the tool:
+
+```shell
+docker-compose run app
+```
+
+```ruby
+Gitlab.users
+=> [#<Gitlab::ObjectifiedHash:47231290771040 {hash: {"id"=>1, "name"=>"Administrator", "username"=>"root", ...]
+```
+
+To launch the specs,
+
+```shell
+docker-compose run app rake spec
+```
+
+#### Want to use Gitlab Enterprise?
+
+Just change the image from `gitlab/gitlab-ce:latest` to `gitlab/gitlab-ee:latest` in the `docker-compose.yml` file.
+
+### With an external Gitlab instance
+
+First, set the variables to the correct values in the `docker.env` file.
+
+Then, launch the tool:
+
+```shell
+docker-compose run app
+```
+
+```ruby
+Gitlab.users
+=> [#<Gitlab::ObjectifiedHash:47231290771040 {hash: {"id"=>1, "name"=>"Administrator", "username"=>"root", ...]
+```
+
+To launch the specs,
+
+```shell
+docker-compose run app rake spec
+```
+
+### Without Docker
+
 After checking out the repo, run `bin/setup` to install dependencies. Then, run
 `rake spec` to run the tests. You can also run `bin/console` for an interactive
 prompt that will allow you to experiment.

docker-compose.yml

@@ -0,0 +1,19 @@
+# For more information, see https://docs.gitlab.com/omnibus/docker/README.html#install-gitlab-using-docker-compose
+version: '3'
+services:
+  app:
+    build: .
+    volumes:
+      - ./:/app
+    env_file: docker.env
+
+  gitlab:
+    image: 'gitlab/gitlab-ce:latest'
+    restart: always
+    hostname: 'gitlab.example.com'
+    environment:
+      GITLAB_OMNIBUS_CONFIG: |
+        external_url 'http://gitlab.example.com:3000'
+        # Add any other gitlab.rb configuration here, each on its own line
+    ports:
+      - 3000:3000

docker.env

@@ -0,0 +1,2 @@
+GITLAB_API_ENDPOINT=http://gitlab:3000/api/v4
+GITLAB_API_PRIVATE_TOKEN=j3CLYZMg_dsTPpCR2HWf