CI: run for every branch, publish only on master

Author: f3l1x

.github/workflows/docker.yml

@@ -2,7 +2,7 @@ name: Docker
 
 on:
   push:
-    branches: master
+    branches: ["*"]
 
 jobs:
   docker:
@@ -58,6 +58,7 @@ jobs:
             ${{ runner.os }}-buildx-
 
       - name: Build and push
+        if: github.ref == 'refs/heads/master'
         uses: docker/build-push-action@v2
         with:
           context: ${{ matrix.version  }}