Build docker image

[ddcprg]

It would be useful configuring a Docker build for this repo and publishing to hub.docker.com or some other public repo.

I've got a Dockerfile I'm using myself to build this, I'll be happy to raise a PR with this and the build settings if you think this can be useful.

[endoplasmicR]

Yes, that would be very useful, there are different base images people may elect to use, but a reference implementation would be valuable

[posulliv]

I wrote some helm charts I use for deploying the gateway and in the repo for the helm charts, I have a Dockerfile and scripts to build a docker image. You can see it here in case its useful - https://github.com/posulliv/lyft-gateway-charts