[Enhancement] Docker support Debugging (byebug & pry) and receive emails to MailHog via smtp (#371)

* updated development docker setup

* turned on yarn integrity check

* create test docker compose and update development dockerfile

* create docker Readme.md file

* fix README.md file

* create docker-copmose and dockerfile for production/staging environment setup

* added mailhog to catch email

* remove yarn integrity check in development mode!

* Update Readme.md file to support mailhog inbox

* update link to docker development guide from mail README

* remove .env.development and use .env.example for docker as .env.development was mixing with circleci config

* make the dockerfile configurable like before

* update docker-compose as per suggesion in PR

* create docker setup docs

* Revert accidental deletion

* fix: typo for branding consistency

* fix typo

* update the code as per recommendation in PR

* remove package-lock and add gitignore

* fix vulnerability AND update env for tests to pass

* Fix yarn integrity check across different docker services

* update code based on rubocop and PR suggestions

* remove redundant test docker-compose and dockerfile

* update rails entrypoint, update docs and Gemfile

* [Rubocop] order Gemfile alphabetically

* Reordering Gemfile

docker-compose.yaml

@@ -1,15 +1,7 @@
 version: '3'
 
-volumes:
-  postgres:
-  redis:
-  bundle:
-  packs:
-  node_modules:
-
 services:
-
-  server: &server
+  base: &base
     build:
       context: .
       dockerfile: ./docker/Dockerfile
@@ -17,39 +9,57 @@ services:
         BUNDLE_WITHOUT: ''
         RAILS_ENV: 'development'
         RAILS_SERVE_STATIC_FILES: 'false'
+    tty: true
+    stdin_open: true
+    image: chatwoot:development
+
+  rails:
+    <<: *base
+    build:
+      context: .
+      dockerfile: ./docker/dockerfiles/rails.Dockerfile
+    image: chatwoot-rails:development
     volumes:
-      - ./:/app:cached
-      - bundle:/bundle:delegated
-      - packs:/app/public/packs
+      - ./:/app:delegated
       - node_modules:/app/node_modules
-    links:
+      - packs:/app/public/packs
+      - cache:/app/tmp/cache
+    depends_on:
       - postgres
       - redis
+      - webpack
+      - mailhog
     ports:
-      - '3000:3000'
+      - 3000:3000
+    env_file: .env.example
     environment:
-      - REDIS_URL=redis://redis:6379
-      - POSTGRES_HOST=postgres
+      - WEBPACKER_DEV_SERVER_HOST=webpack
+      - NODE_ENV=development
       - RAILS_ENV=development
-      - WEBPACKER_DEV_SERVER_HOST=webpacker
+    entrypoint: docker/entrypoints/rails.sh
     command: ["bundle", "exec", "rails", "s", "-p", "3000", "-b", "0.0.0.0"]
-
-  webpacker:
-    <<: *server
-    command: ./bin/webpack-dev-server
-    depends_on:
-      - "server"
-    ports:
-      - '3035:3035'
+  
+  webpack:
+    <<: *base
+    build:
+      context: .
+      dockerfile: ./docker/dockerfiles/webpack.Dockerfile
+    image: chatwoot-webpack:development
     volumes:
-      - .:/app:cached
-      - bundle:/bundle
-      - node_modules:/app/node_modules
+      - ./:/app:delegated
+      - node_modules:/app/node_modules # Node modules shared across containers
       - packs:/app/public/packs
+      - cache:/app/tmp/cache
+    ports:
+      - "3035" # Webpack dev server
+    env_file: .env.example
     environment:
-      - "NODE_ENV=development"
-      - "RAILS_ENV=development"
-      - "WEBPACKER_DEV_SERVER_HOST=0.0.0.0"
+      - WEBPACKER_DEV_SERVER_HOST=0.0.0.0
+      - NODE_ENV=development
+      - RAILS_ENV=development
+    entrypoint: docker/entrypoints/webpack.sh
+    command: bin/webpack-dev-server
+
   postgres:
     image: postgres:9.6
     restart: always
@@ -69,3 +79,16 @@ services:
       - redis:/data/redis
     ports:
       - '6379:6379'
+
+  mailhog:
+    image: mailhog/mailhog
+    ports:
+      - 1025:1025
+      - 8025:8025
+
+volumes:
+  postgres:
+  redis:
+  packs:
+  node_modules:
+  cache: