putting api on a diet (ship:docker) (#1250)

Author: GbArc

Dockerfile

@@ -2,33 +2,33 @@ FROM ruby:2.7.5-slim
 
 LABEL maintainer Travis CI GmbH <[email protected]>
 
-# packages required for bundle install
+RUN ( \
+   bundle config set no-cache 'true'; \
+   bundle config --global frozen 1; \
+   bundle config set deployment 'true'; \
+   mkdir -p /app; \
+)
+
+WORKDIR /app
+
+COPY Gemfile*      /app/
+
 RUN ( \
    apt-get update ; \
-   # update to deb 10.8 
    apt-get upgrade -y ; \
    apt-get install -y --no-install-recommends git make gcc g++ libpq-dev libjemalloc-dev \
    && rm -rf /var/lib/apt/lists/* \
+   gem install bundler -v '2.3.6'; \
+   bundle config set without 'development test'; \
+   bundler install --verbose --retry=3; \
+   bundle config set frozen true; \
+   apt-get remove -y gcc g++ make git perl && apt-get -y autoremove; \
+   bundle clean && rm -rf /app/vendor/bundle/ruby/2.7.0/cache/*; \
+   for i in `find /app/vendor/ -name \*.o -o -name \*.c -o -name \*.h`; do rm -f $i; done; \
 )
 
 ENV LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.2
 
-# throw errors if Gemfile has been modified since Gemfile.lock
-RUN bundle config --global frozen 1
-RUN bundle config set deployment 'true'
-
-RUN mkdir -p /app
-WORKDIR /app
-
-COPY Gemfile      /app
-COPY Gemfile.lock /app
-
-RUN gem install bundler -v '2.3.6'
-RUN bundle config set without 'development test'
-RUN bundler install --verbose --retry=3
-RUN gem install --user-install executable-hooks
-
 COPY . /app
 
-RUN bundle config set frozen true
-CMD ./script/server-buildpacks
+CMD ["./script/server-buildpacks"]

Makefile

@@ -27,7 +27,7 @@ DOCKER ?= docker
 
 .PHONY: docker-build
 docker-build:
-	$(DOCKER) build -t $(DOCKER_DEST) .
+	$(DOCKER) build --no-cache --pull -t $(DOCKER_DEST) .
 
 .PHONY: docker-login
 docker-login: