Dockerize signature aggregator

[feuGeneA]

Context and scope

• Add a Dockerfile
  • The application can be built in a few ways:
    • With a build stage that uses the golang-bullseye image - see https://github.com/ava-labs/teleporter-analytics/blob/main/Dockerfile
    • Using goreleaser- see https://github.com/ava-labs/awm-relayer/blob/main/.github/workflows/release.yml#L66
  • The Dockerfile should run the service using a lightweight image. golang-bullseye is overkill, debian:11-slim is a good choice. See again https://github.com/ava-labs/teleporter-analytics/blob/main/Dockerfile#L23C6-L23C20
  • Make sure the Dockerfile exposes the health check port 8080 (and any other ports (et API, metrics)), and does not set a user.
• Add a CI job to build & push the docker image
  • Add a release job to publish the image to dockerhub
  • Manual docker build and push example: https://github.com/ava-labs/teleporter-analytics/blob/main/.github/workflows/release.yml
    goreleaseer example: https://github.com/ava-labs/awm-relayer/blob/main/.github/workflows/release.yml
• Create the target dockerhub repo in avaplatform. Create an infra ticket in Jira.
• Add the DOCKER_USERNAME and DOCKER_PASSWORD secrets to the github repo. Create an infra ticket in Jira.