Got an error in asset precompile on Heroku: Module build failed: Error: ENOENT: no such file or directory, scandir '/tmp/.../node_modules/node-sass/vendor' ref: https://github.com/rails/webpacker#troubleshooting
Use https://github.com/heroku/heroku-buildpack-apt to install protobuf-compiler and libprotobuf-dev which are needed by cid3