Problem building Dockerfile

Dockerfile Wasp generates contains this line:

EXPOSE ${PORT}

This is not defined as a build arg, so how can I set it? When I try to just build the image with

podman build .

podman build .

I get this error:

Error: building at STEP "EXPOSE ${PORT}": EXPOSE requires at least one argument

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Rails-like framework for React, Node.js and Prisma. Build your app in a day and deploy it with a single CLI command.

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