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

How do I fix the error "Record is managed by an App on this account, and cannot be deleted"?

Use the app’s Settings tab to remove domains associated with App Platform apps.

Why do I get the error “JavaScript heap out of memory” during deployment?

Increase the heap memory by setting the environment variable NODE_OPTIONS=–max-old-space-size=4096.

How do I fix a "permission denied for schema public" error in my dev database?

Delete the existing dev database and create a new one. Then make sure that the app deployment completes successfully.