✨ feat(fleetledger): add initial implementation of FleetLedger app

- introduce Dockerfile for Python environment setup
- create FastAPI app with authentication and user management
- implement server management features with CRUD operations
- add PWA support with service worker and manifest
- set up initial templates for UI components

📝 docs(fleetledger): add README for FleetLedger application

- describe app features and functionalities
- provide security notes and quick start guide

📦 build(fleetledger): configure Docker and docker-compose setup

- define Dockerfile for application container
- create docker-compose.yml for service orchestration
- specify environment variables and volumes for persistence

fleetledger/app/static/manifest.webmanifest

@@ -0,0 +1,20 @@
+{
+  "name": "FleetLedger",
+  "short_name": "FleetLedger",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#020617",
+  "theme_color": "#020617",
+  "icons": [
+    {
+      "src": "/static/icon-192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "/static/icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ]
+}