chore: Only build docker image on tagged releases

Author: stevensdavid

.github/workflows/docker.yaml

@@ -4,7 +4,6 @@ name: Create and publish a Docker image
 # Configures this workflow to run every time a change is pushed to the branch called `release`.
 on:
   push:
-    branches: ["main"]
     tags: ["v*"]
 
 # Defines two custom environment variables for the workflow. These are used for the Container registry domain, and a name for the Docker image that this workflow builds.