Simplify Docker files

Dockerfile

@@ -1,16 +1,9 @@
 FROM ruby:2.3.0
 
-ENV WORKER_PROCESSES 4
+RUN mkdir /app
-ENV DATABASE_URL postgres://postgres:mysecretpassword@postgres/fixer
+WORKDIR /app
-ENV VERSION 1
+ADD Gemfile /app/Gemfile
-
+ADD Gemfile.lock /app/Gemfile.lock
-RUN mkdir /fixer-io
+RUN bundle install --without development test
-WORKDIR /fixer-io
+ADD . /app
-ADD Gemfile /fixer-io/Gemfile
+CMD bundle exec unicorn -c /app/config/unicorn.rb
-ADD Gemfile.lock /fixer-io/Gemfile.lock
-RUN bundle install --deployment --without development:test
-ADD . /fixer-io
-
-EXPOSE 8080
-
-CMD bundle exec unicorn -p 8080 -c /fixer-io/config/unicorn.rb

docker-compose.yml

@@ -1,20 +1,17 @@
 version: '2'
 services:
-  postgres:
+  db:
     image: postgres
     ports:
       - 5432:5432
-    environment:
+  web:
-      - POSTGRES_DB=fixer
-  fixer:
     build: .
-    command: bundle exec unicorn -p 8080 -c /fixer-io/config/unicorn.rb
     volumes:
-      - .:/fixer-io
+      - .:/app
     ports:
       - 8080:8080
     environment:
       - RACK_ENV=production
-      - DATABASE_URL=postgres://postgres:mysecretpassword@postgres/fixer
+      - DATABASE_URL=postgres://postgres@db/postgres
-    depends_on:
+    links:
-      - postgres
+      - db