Avoid Gemfile from site hiding installed gems

I’ve specified the BUNDLE_GEMFILE as the one that exists in the /src/site location (the source of the site being built) was preventing Jekyll from finding the installed dependencies.

Dockerfile

@@ -28,6 +28,8 @@ ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US.UTF-8
 ENV LC_ALL en_US.UTF-8
 
+ENV BUNDLE_GEMFILE=/src/gh/pages-gem/Gemfile
+
 WORKDIR /src/site
 
 CMD ["jekyll", "serve", "-H", "0.0.0.0", "-P", "4000"]

Dockerfile.alpine

@@ -17,6 +17,8 @@ ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US.UTF-8
 ENV LC_ALL en_US.UTF-8
 
+ENV BUNDLE_GEMFILE=/src/gh/pages-gem/Gemfile
+
 WORKDIR /src/site
 
 CMD ["jekyll", "serve", "-H", "0.0.0.0", "-P", "4000"]