Hello, we may need more details to be able to help… But one thing to note is that environment variables are only available as build-args for Dockerfile builds in App Platform. So you should declare them in the Dockerfile as an ARG and then set the ENV variable in the Dockerfile from the build-arg.

If for example you set MY_ENV_VAR env var in application spec file or via App Platform UI, then something like this may work to actually pass that value into the container:

ARG MY_ENV_VAR
ENV MY_ENV_VAR=${MY_ENV_VAR}

Hope this helps.