Reduce Docker image

.dockerignore

@@ -0,0 +1,18 @@
+.env*
+.git
+.gitignore
+.codeclimate.yml
+.dockerignore
+.hound.yml
+.travis.yml
+LICENSE.md
+README.md
+docker-compose.*
+Dockerfile
+log/*
+node_modules/*
+public/assets/*
+storage/*
+public/packs/*
+public/packs-test/*
+tmp/*

Dockerfile

@@ -1,14 +1,14 @@
-FROM ruby:2.5.0-alpine
-
-LABEL maintainer="opensanca@opensanca.com"
+# build stage
+FROM ruby:2.5.0-alpine AS builder
 
+ARG build_without
 ARG rails_env="development"
-ARG build_without=""
+ARG to_remove
 
 ENV SECRET_KEY_BASE=dumb
+ENV EXECJS_RUNTIME=Node
 
-RUN apk update \
-  && apk add \
+RUN apk add --update --no-cache \
     openssl \
     tar \
     build-base \
@@ -21,10 +21,37 @@ RUN apk update \
   && tar -xf latest.tar.gz -C /opt/yarn --strip 1 \
   && mkdir -p /var/app
 
-ENV PATH="$PATH:/opt/yarn/bin" BUNDLE_PATH="/gems" BUNDLE_JOBS=2 RAILS_ENV=${rails_env} BUNDLE_WITHOUT=${bundle_without}
+ENV PATH="$PATH:/opt/yarn/bin" BUNDLE_JOBS=4 RAILS_ENV=${rails_env} BUNDLE_WITHOUT=${bundle_without}
 
 COPY . /var/app
 WORKDIR /var/app
 
-RUN bundle install && yarn && bundle exec rake assets:precompile
-CMD rails s -b 0.0.0.0
+RUN bundle install && yarn && bundle exec rake assets:precompile \
+ && rm -rf /usr/local/bundle/cache/*.gem \
+ && find /usr/local/bundle/gems/ -name "*.c" -delete \
+ && find /usr/local/bundle/gems/ -name "*.o" -delete \
+ && rm -rf $to_remove
+
+# final stage
+FROM ruby:2.5.0-alpine
+LABEL maintainer="contato@opensanca.com.br"
+
+ARG extra_packages
+
+RUN apk add --update --no-cache \
+    openssl \
+    tzdata \
+    postgresql-dev \
+    postgresql-client \
+    $extra_packages
+
+COPY --from=builder /usr/local/bundle/ /usr/local/bundle/
+COPY --from=builder /var/app /var/app
+
+ENV RAILS_LOG_TO_STDOUT true
+
+WORKDIR /var/app
+
+EXPOSE 3000
+
+CMD bin/rails s -b 0.0.0.0

docker-compose.yml

@@ -21,8 +21,12 @@ services:
       timeout: 5s
       retries: 3
 
-  web:
-    build: .
+  web: &base_image
+    build: 
+      context: .
+      args:
+        - extra_packages=nodejs
+        - rails_env=development
     depends_on:
       - db
       - redis
@@ -33,15 +37,16 @@ services:
       - 3000:3000
     volumes:
       - .:/var/app
-      - gemdata:/gems
-    command: rails s -b '0.0.0.0'
+      - gemdata:/usr/local/bundle/
+    command: bin/rails s -b '0.0.0.0'
     environment:
       DATABASE_URL: postgres://postgres:@db/
+      EXECJS_RUNTIME: Node
       REDIS_URL: redis://redis:6379
       SMTP_ADDRESS: mail
 
   jobs:
-    build: .
+    <<: *base_image
     depends_on:
       - db
       - redis
@@ -50,12 +55,9 @@ services:
       - redis
     volumes:
       - .:/var/app
-      - gemdata:/gems
-    command: sidekiq -q critical,2 -q default
-    environment:
-      DATABASE_URL: postgres://postgres:@db/
-      REDIS_URL: redis://redis:6379
-      SMTP_ADDRESS: mail
+      - gemdata:/usr/local/bundle/
+    command: bundle exec sidekiq -q critical,2 -q default
+    ports: []
 
   mail:
     image: mailhog/mailhog:latest

package.json

@@ -2,7 +2,7 @@
   "name": "opensanca_jobs",
   "private": true,
   "engines": {
-    "node": "8.10.0"
+    "node": "8.9.3"
   },
   "dependencies": {
     "autoprefixer": "^7.1.1",