feat(healthcheck): enhance health check functionality and serve favicon directly

healthcheck.py

@@ -5,10 +5,11 @@ import os
 
 def check_health():
     try:
-        host = os.environ.get('ADGUARD_HOST', 'http://localhost')
+        host = os.environ.get('ADGUARD_HOST', 'localhost')
         port = os.environ.get('ADGUARD_PORT', '8000')
+        url = f'http://{host}:{port}/health'
         with httpx.Client() as client:
-            response = client.get('http://localhost:8000/health')
+            response = client.get(url)
             response.raise_for_status()
         print('✅ Service is healthy')
         sys.exit(0)

src/simpleguardhome/main.py

@@ -59,10 +59,19 @@ templates = Jinja2Templates(directory=str(templates_path))
 # Mount static files from package directory
 app.mount("/static", StaticFiles(directory=str(Path(__file__).parent)), name="static")
 
-# Mount favicon.ico at root
-static_files_path = Path(__file__).parent
-app.mount("/favicon.ico",
-          StaticFiles(directory=str(static_files_path)), name="favicon")
+# Serve favicon.ico directly
+from fastapi.responses import FileResponse
+favicon_path = Path(__file__).parent / "favicon.ico"
+
+@app.get("/favicon.ico")
+async def favicon():
+    """Serve favicon."""
+    return FileResponse(favicon_path)
+
+@app.get("/health")
+async def health_check():
+    """Health check endpoint."""
+    return {"status": "healthy"}
 
 # Response models matching AdGuard spec