Add metrics

src/core/app.py

@@ -1,5 +1,7 @@
 from fastapi import FastAPI
 
+from prometheus_fastapi_instrumentator import Instrumentator
+
 from app.views import router
 
 
@@ -8,4 +10,6 @@ def start_app() -> FastAPI:
 
     app.include_router(router)
 
+    Instrumentator().instrument(app).expose(app, include_in_schema=True)
+
     return app