Include the Webpacker host on the web/app service #2311
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The environment variable for WEBPACKER_DEV_SERVER_HOST is required for the web/app container to be able to proxy /packs requests to the webpack-dev-server container.
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The environment variable for WEBPACKER_DEV_SERVER_HOST is required for the web/app container to be able to proxy /packs requests to the webpack-dev-server container. Otherwise the rails app will compile on-demand locally.
After struggling for a while, I discovered 2 issues that helped shine some light on the problem, ultimately discovering that only the one environment variable was needed.