docker: tag versions with latest (#232)

.github/workflows/docker-build.yml

@@ -1,7 +1,7 @@
 name: Docker Image
 on:
   push:
-    branches: [ "master", "develop" ]
+    branches: [ "develop" ]
     tags: [ "v*" ]
   pull_request:
 jobs:
@@ -23,6 +23,8 @@ jobs:
             type=semver,pattern={{version}}
             type=sha
             type=edge,branch=develop
+          flavor: |
+            latest=auto
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
       - name: Login to DockerHub