feat: build docker image tagged "edge" on push to main branch (lllyasviel#3026)

* feat: build docker image on push to main branch

* feat: add tag "edge" for main when building the docker image

* feat: update name of build container workflow

Author: mashb1t

.github/workflows/build_container.yml

@@ -1,9 +1,11 @@
-name: Create and publish a container image
+name: Docker image build
 
 on:
   push:
+    branches:
+      - main
     tags:
-      - 'v*'
+      - v*
 
 jobs:
   build-and-push-image:
@@ -33,6 +35,7 @@ jobs:
             type=semver,pattern={{version}}
             type=semver,pattern={{major}}.{{minor}}
             type=semver,pattern={{major}}
+            type=edge,branch=main
 
       - name: Build and push Docker image
         uses: docker/build-push-action@v5