Add Dockerfile, docker-compose.yml

Author: yhirano55

.dockerignore

@@ -0,0 +1,8 @@
+.bundle
+.circleci
+.git
+vendor/bundle
+log/*
+!/log/.keep
+tmp/*
+!/tmp/.keep

Dockerfile

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+FROM ruby:2.4
+ENV LANG=C.UTF-8
+RUN apt-get update -qq && \
+    apt-get install -y --no-install-recommends \
+      postgresql-client \
+      nodejs \
+      cmake \
+      pkg-config \
+      curl \
+      libsodium-dev && \
+    gem update --system && \
+    gem install bundler
+WORKDIR /rails-contributors
+COPY Gemfile* ./
+RUN bundle install -j3
+COPY . /rails-contributors

docker-compose.yml

@@ -0,0 +1,26 @@
+version: '3'
+
+services:
+  app:
+    image: rails-contributors
+    build: .
+    command: rails s -p 3000 -b 0.0.0.0
+    environment:
+      DATABASE_URL: postgres://postgres:@db:5432
+    ports:
+      - '3000:3000'
+    depends_on:
+      - db
+    tty: true
+    stdin_open: true
+    volumes:
+      - .:/rails-contributors
+  db:
+    image: postgres
+    volumes:
+      - postgres:/var/lib/postgresql/data
+    ports:
+      - '5432:5432'
+
+volumes:
+  postgres: