chore: reduce size of the container image

linki · Apr 27, 2017 · df3d8a0 · df3d8a0
1 parent cf9f9a4
commit df3d8a0
Showing 1 changed file with 12 additions and 10 deletions.
diff --git a/Dockerfile b/Dockerfile
@@ -1,21 +1,23 @@
 FROM alpine:3.5
 MAINTAINER Linki <linki+docker.com@posteo.de>
 
-RUN apk add --no-cache \
-  build-base           \
-  linux-headers        \
-  ruby-bundler         \
-  ruby-dev             \
-  ruby-io-console
-
-RUN bundle config --global frozen 1
-
 RUN mkdir -p /app
 WORKDIR /app
 
 COPY Gemfile Gemfile.lock /app/
 
-RUN bundle install
+RUN apk add --no-cache --virtual build_deps \
+      build-base                            \
+      linux-headers                         \
+      ruby-bundler                          \
+      ruby-dev                           && \
+
+    bundle config --global frozen 1      && \
+    bundle install                       && \
+
+    apk del build_deps
+
+RUN apk add --no-cache ruby
 
 COPY lib /app/lib
 COPY config.ru /app/