Introduces openSUSE based docker-compose environment

Dockerfile.production

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+FROM osem/base
+
+# We copy the Gemfiles into this intermediate build stage so it's checksum
+# changes and all the subsequent stages (a.k.a. the bundle install call below)
+# have to be rebuild. Otherwise, after the first build of this image,
+# docker would use it's cache for this and the following stages.
+COPY Gemfile /osem/
+COPY Gemfile.lock /osem/
+RUN chown -R osem /osem
+
+# Add our files
+USER osem
+WORKDIR /osem/
+COPY --chown=osem:osem . /osem/
+
+# Install our bundle
+RUN export NOKOGIRI_USE_SYSTEM_LIBRARIES=1; bundle install --jobs=3 --retry=3 --without test development
+
+# Configure OSEM
+RUN mv config/database.yml.example config/database.yml
+
+ENV RAILS_ENV=production
+
+CMD ["foreman", "start"]