add gh actions

.github/workflows/firebase-hosting-merge.yml

@@ -0,0 +1,26 @@
+# This file was auto-generated by the Firebase CLI
+# https://github.com/firebase/firebase-tools
+
+name: Deploy to Firebase Hosting on merge
+"on":
+  push:
+    branches:
+      - master
+jobs:
+  build_and_deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup dotnet
+        uses: actions/setup-dotnet@v3
+        with:
+          dotnet-version: "8.x.x"
+          cache: true
+      - run: dotnet workload install wasm-tools
+      - run: dotnet publish -c Release src/Mandadin.Client -o dist
+      - uses: FirebaseExtended/action-hosting-deploy@v0
+        with:
+          repoToken: "${{ secrets.GITHUB_TOKEN }}"
+          firebaseServiceAccount: "${{ secrets.FIREBASE_SERVICE_ACCOUNT_MANDADIN_4 }}"
+          channelId: live
+          projectId: mandadin-4