Switched to Chainguard base docker image

Author: fileformat

Dockerfile

@@ -1,15 +1,24 @@
-FROM bitnami/ruby:latest
+FROM cgr.dev/chainguard/ruby:latest-dev as builder
 
-WORKDIR /app
+ENV GEM_HOME=/work/vendor
+ENV GEM_PATH=${GEM_PATH}:/work/vendor
+COPY Gemfile /work/
+#COPY Gemfile.lock /work/
+RUN gem install bundler && bundle install
 
-COPY . .
-RUN bundle install
+FROM cgr.dev/chainguard/ruby:latest
+
+ENV GEM_HOME=/work/vendor
+ENV GEM_PATH=${GEM_PATH}:/work/vendor
+
+COPY --from=builder /work/ /work/
 
 ARG COMMIT="(not set)"
 ARG LASTMOD="(not set)"
 ENV COMMIT=$COMMIT
 ENV LASTMOD=$LASTMOD
 
-EXPOSE 4567
-CMD ["ruby", "./regexplanet.rb"]
+WORKDIR /work
+COPY . .
 
+ENTRYPOINT [ "ruby", "./regexplanet.rb" ]