also build image on push to main

.gitea/workflows/daily-build.yml

@@ -3,6 +3,9 @@ name: Daily Build Silverblue Image
 on:
   schedule:
     - cron: '0 0 * * *'
+  push:
+    branches:
+      - main
 
 jobs:
   build:
@@ -17,8 +20,8 @@ jobs:
       - name: Login to Gitea registry
         uses: docker/login-action@v2
         with:
-          username: ${{ secrets.GITEA_USERNAME }}
-          password: ${{ secrets.GITEA_PASSWORD }}
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
 
       - name: Build Image
         run: |