Help Wanted! Creating a custom envoy docker image

Hello!, I wrote a custom http filter for envoy (following the sample available here). I am able to build the project and generate an envoy static binary using `bazel build //http-filter-example:envoy`. I tried to generate a docker image for envoy with this custom filter included following the documentation [here](https://www.envoyproxy.io/docs/envoy/latest/install/sandboxes/local_docker_build) but it doesn't seem to factor in the custom filter I added.

How do I go about creating a custom docker image for envoy with the filter that I just added?

Sorry, I am new to envoy and bazel and I apologize if I am asking something that is already documented somewhere.

Thanks!