[openstreetmap/openstreetmap-website] Add Docker Compose Support for Development Environment (#2409)

[Tom Hughes]

tomhughes commented on this pull request.



> +      ruby-dev \
+      yarn && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+# Setup app location
+RUN mkdir -p /app
+WORKDIR /app
+
+# Install Ruby packages
+ADD Gemfile Gemfile.lock /app/
+RUN bundle install
+
+# Install NodeJS packages
+ADD package.json yarn.lock /app/
+RUN yarn

You're already done `bundle install` which should install everything `bundle exec` might need - if you don't use `bundle exec` then you have no idea if things are using the expected modules, or even if they will work at all.

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