Well are there any errors in the app logs then? Also maybe you can share the exact env variables you are trying to set with a link to the upstream docs.
Hey, nebulon! Thanks for asking. I solved the problem: do not include a space before or after the = in the configuration line:
Good: export NEXT_PUBLIC_GIPHY_API_KEY=StringfromGiphyhere
Bad: export NEXT_PUBLIC_GIPHY_API_KEY = StringfromGiphyhere
Also, remember to include export at the beginning of the line, as mentioned in the Cloudron documentation.