Hello, I’m new with Docker and trying to simply serve an image on Heroku which should run and accept HTTP requests. Everything works locally, but when I try to push, it says “unsupported: Your Docker image must specify a CMD instruction.” So, it turns out I need a Dockerfile. I’m trying to make a simple Dockerfile which will run the image and use $PORT. Any help would be appreciated. Thank you.
Found my answer. The following worked:
FROM tf-serve
CMD [“tf-serve”]
where tf-serve was my image name. Not sure if the port is working yet, but this at least gets it up and running.
To expose ports, use EXPOSE 80 443 in the Dockerfile.
Ended up going a different route and didn’t need the Dockerfile. Thanks though!