Add JustRunMy.App image deploy workflow

Author: keepsloading

.github/workflows/deploy-justrunmy.yml

@@ -0,0 +1,31 @@
+name: Deploy to JustRunMy.App
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v5
+
+      - name: Log in to JustRunMy.App registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ secrets.JUSTRUNMY_REGISTRY }}
+          username: ${{ secrets.JUSTRUNMY_REGISTRY_USERNAME }}
+          password: ${{ secrets.JUSTRUNMY_REGISTRY_PASSWORD }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: ${{ secrets.JUSTRUNMY_IMAGE }}