Add Docker support and containerization

- Add Dockerfile for Next.js application
- Configure standalone output for Docker
- Add .dockerignore file
- Add docker-compose.yml for easy deployment
- Update next.config.ts for Docker compatibility

public/manifest.json

@@ -0,0 +1,21 @@
+{
+  "name": "Prayer App",
+  "short_name": "Prayers",
+  "description": "A personal prayer and praise journaling app",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#000000",
+  "theme_color": "#000000",
+  "icons": [
+    {
+      "src": "/icon-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "/icon-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ]
+}