More docker

.env.docker

+NODE_ENV=development
+RAILS_ENV=development
+WEBPACKER_DEV_SERVER_HOST=0.0.0.0

Dockerfile

@@ -6,18 +6,21 @@ FROM ruby:2.5.7
 RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app
 
-EXPOSE 3000
-CMD ["rails", "server", "-b", "0.0.0.0"]
-
 RUN apt-get update && apt-get install -y nodejs --no-install-recommends && rm -rf /var/lib/apt/lists/*
-RUN apt-get update && apt-get install -y default-mysql-client postgresql-client sqlite3 --no-install-recommends && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y default-mysql-client postgresql-client sqlite3 yarn --no-install-recommends && rm -rf /var/lib/apt/lists/*
 #RUN gem install bundler -v 1.17.3
 COPY Gemfile /usr/src/app/
 
 # Uncomment the line below if Gemfile.lock is maintained outside of build process
 COPY Gemfile.lock /usr/src/app/
 
-
 RUN bundle install
 
 COPY . /usr/src/app
+
+# COPY entrypoint.sh /usr/bin/
+# RUN chmod +x /usr/bin/entrypoint.sh
+# ENTRYPOINT ["entrypoint.sh"]
+EXPOSE 3000
+
+CMD ["rails", "server", "-b", "0.0.0.0"]

docker-compose.yml

-version: "3"
+version: '3'
 services:
-  db:
-    image: postgres
+  webpacker:
+    build: .
+    env_file:
+      - '.env.docker'
+    command: ./bin/webpack-dev-server
     volumes:
-      - ./tmp/db:/var/lib/postgresql/data
-    environment:
-      POSTGRES_PASSWORD: password
+      - .:/app
+    ports:
+      - '3035:3035'
   web:
     build: .
     command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
     volumes:
-      - .:/myapp
+      - .:/app
     ports:
       - "3000:3000"
-    depends_on:
-      - db

entrypoint.sh

+#!/bin/sh
+set -e
+
+# Remove a potentially pre-existing server.pid for Rails.
+rm -f /myapp/tmp/pids/server.pid
+
+# Then exec the container's main process (what's set as CMD in the Dockerfile).
+exec "$@"