added backend workflow

.github/workflows/deploy-backend.yml

@@ -0,0 +1,33 @@
+name: Deploy Backend (Azure Functions)
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    name: Build and Deploy Backend
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup .NET 8
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '8.0.x'
+
+      - name: Restore dependencies
+        run: dotnet restore src/Backend/AutopilotMonitor.Functions/AutopilotMonitor.Functions.csproj
+
+      - name: Build
+        run: dotnet build src/Backend/AutopilotMonitor.Functions/AutopilotMonitor.Functions.csproj --configuration Release --no-restore
+
+      - name: Publish
+        run: dotnet publish src/Backend/AutopilotMonitor.Functions/AutopilotMonitor.Functions.csproj --configuration Release --output ./publish --no-build
+
+      - name: Deploy to Azure Functions
+        uses: Azure/functions-action@v1
+        with:
+          app-name: autopilotmonitor-api
+          package: ./publish
+          publish-profile: ${{ secrets.AZURE_FUNCTIONAPP_PUBLISH_PROFILE }}