Add Docker files, Update rails commands

.dockerignore

@@ -0,0 +1,38 @@
+.git
+.gitignore
+
+.bundle
+.rake_tasks*
+db/*.sqlite3
+log
+node_modules
+tmp/*
+public/assets
+public/system
+public/uploads
+supplier_assets/**
+vendor/bundle
+
+# no configuration
+config/*.yml
+
+# IDEs, Developer tools
+.idea
+.loadpath
+.project
+.sass-cache
+.rbenv-version
+.get-dump.yml
+.bash_history
+nbproject/
+.*.sw?
+*~
+
+coverage
+tags
+
+# Capistrano etc.
+Capfile
+config/deploy
+config/deploy.rb
+Gemfile.capistrano*

Dockerfile

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+FROM ruby:2.3
+
+RUN supercronicUrl=https://github.com/aptible/supercronic/releases/download/v0.1.3/supercronic-linux-amd64 && \
+    supercronicBin=/usr/local/bin/supercronic && \
+    supercronicSha1sum=96960ba3207756bb01e6892c978264e5362e117e && \
+    curl -fsSL -o "$supercronicBin" "$supercronicUrl" && \
+    echo "$supercronicSha1sum  $supercronicBin" | sha1sum -c - && \
+    chmod +x "$supercronicBin"
+
+ENV PORT=3000 \
+    RAILS_ENV=production \
+    RAILS_LOG_TO_STDOUT=true \
+    RAILS_SERVE_STATIC_FILES=true
+
+WORKDIR /usr/src/app
+
+COPY . ./
+
+# install dependencies, recognize database_url, generate crontab
+RUN echo 'gem: --no-document' >> ~/.gemrc && \
+    bundle config build.nokogiri "--use-system-libraries" && \
+    bundle install --deployment --without development test -j 4 && \
+    rm -Rf /var/lib/apt/lists/* /var/cache/apt/* ~/.gemrc ~/.bundle && \
+    \
+    echo "production:\n  url: <%= ENV['DATABASE_URL'] %>" >config/database.yml && \
+    bundle exec whenever >crontab
+
+# compile assets with temporary mysql server
+RUN export DATABASE_URL=mysql2://localhost/temp && \
+    export SECRET_TOKEN=thisisnotimportantnow && \
+    export DEBIAN_FRONTEND=noninteractive && \
+    apt-get update && \
+    apt-get install -y mysql-server && \
+    /etc/init.d/mysql start && \
+    rails db:setup assets:precompile && \
+    rm -Rf tmp/* && \
+    /etc/init.d/mysql stop && \
+    rm -Rf /run/mysqld /tmp/* /var/tmp/* /var/lib/mysql /var/log/mysql* && \
+    apt-get purge -y --auto-remove mysql-server && \
+    rm -Rf /var/lib/apt/lists/* /var/cache/apt/*
+
+# Make relevant dirs writable for app user
+RUN mkdir -p tmp supplier_assets && \
+    chown nobody tmp supplier_assets
+
+# Run app as unprivileged user
+USER nobody
+
+EXPOSE 3000
+
+# cleanup, and by default start web process from Procfile
+ENTRYPOINT ["./docker-entrypoint.sh"]
+CMD ["./proc-start", "web"]

Dockerfile.development

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+FROM alpine:3.5
+
+ENV BUILD_PKGS="build-base ruby-dev libffi-dev libxml2-dev mariadb-dev" \
+    RUNTIME_PKGS="ruby ruby-json ruby-bigdecimal ruby-irb ruby-bundler ca-certificates mariadb-client" \
+    DEVELOPMENT_PKGS="bash"
+
+RUN apk --no-cache add $BUILD_PKGS $RUNTIME_PKGS $DEVELOPMENT_PKGS
+
+RUN adduser -D -u 1000 -h /srv/app -s /bin/bash app
+WORKDIR /srv/app
+USER app
+
+ENV BUNDLE_JOBS=4 \
+  BUNDLE_PATH=/srv/app/vendor/bundle \
+  GEM_PATH=/srv/app/vendor/bundle:$GEM_PATH \
+  PATH=/srv/app/vendor/bundle/bin:$PATH
+
+EXPOSE 3000
+
+CMD ["bash"]

Procfile

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+web: rails server --binding=0.0.0.0 --port=$PORT
+mail: rails mail:smtp_server
+cron: supercronic crontab

docker-compose.yml

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+version: "2"
+
+volumes:
+  mysql:
+
+services:
+  app:
+    build:
+      context: ./
+      dockerfile: Dockerfile.development
+    command: rails server --bind 0.0.0.0
+    volumes:
+      - ./:/srv/app
+    ports:
+      - 3000:3000
+    depends_on:
+      - mysql
+
+  mysql:
+    image: mariadb:10.1
+    volumes:
+      - mysql:/var/lib/mysql
+    environment:
+      MYSQL_ROOT_PASSWORD: secret

docker-entrypoint.sh

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+#!/bin/sh
+set -e
+
+# allow re-using the instance - https://stackoverflow.com/a/38732187/2866660
+if [ -f tmp/pids/server.pid ]; then
+  rm tmp/pids/server.pid
+fi
+
+exec "$@"

proc-start

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+#!/bin/sh
+#
+# Run single command from Procfile
+#
+# This script is a basic replacement for foreman when running on Docker. When
+# starting the docker instance, specify as command `script/start <type>`.
+# `type` is looked up in `Procfile` and the command is started. This allows e.g.
+# docker-compose to run multiple process/dyno types from a single image, without
+# needing to know the exact command (which may change over time).
+#
+if [ ! "$1" ]; then
+  echo "Usage: $0 <process type>" 1>&2
+  echo
+  echo "Note that some process types need the PORT environment variable."
+  exit 1
+fi
+
+CMD=`cat Procfile | grep "^$1:" | cut -d: -f2-`
+if [ ! "$CMD" ]; then
+  echo "Process type $1 not found in Procfile" 1>&2
+  exit 1
+fi
+
+exec /bin/sh -c "$CMD"