Why can't I access my environment variables at build time when building from a Dockerfile on App Platform?

If you are using a Dockerfile to deploy your app on App Platform, environment variables are only available at build time if you have set them using the --build-arg option in Docker before deploying the app.

For example, to access the variable EXAMPLE=your-value during build time, set it in the image using the docker CLI like this:

docker build --build-arg EXAMPLE=your-value

You cannot use this method to access bindable variables at build time. If you are supplying a Dockerfile, bindable variables are only available at runtime.

Related Topics

Why do I get the error "Domain Already Exists" when trying to add a domain to an app in another account?

You cannot add the same domain name to multiple apps or split an app and domain name across more than one account.

How do I fix an "Image or digest not found" error with multiple registries?

Specify the registry property in the app spec.

Why am I getting an error when trying to forward DigitalOcean Functions to Managed OpenSearch?

Functions does not support forwarding to Managed OpenSearch.