Merge branch 'dev' into setup-github-workflows

Author: NorbertLoh

frontend/peerprep/Dockerfile

@@ -19,4 +19,5 @@ COPY ./package.json package-lock.json /app/
 COPY --from=production-dependencies-env /app/node_modules /app/node_modules
 COPY --from=build-env /app/build /app/build
 WORKDIR /app
-CMD ["npm",  "start"]
+EXPOSE 3000
+CMD ["npm",  "start"]