feat: add health check endpoint and change swagger's name

src/main.py

@@ -80,7 +80,7 @@ app: FastAPI = FastAPI(
     redoc_url=None,
     docs_url=None,
     lifespan=lifespan,
-    title='Elcsa Users Service'
+    title='Elcsa. Pay service Service'
 )
 
 app.add_exception_handler(ApplicationException, application_exception_handler)
@@ -143,3 +143,10 @@ async def ping() -> dict[str, str]:
         'message': 'pong',
         'status': 'ok',
     }
+
+@app.get('/health')
+async def health() -> dict[str, str]:
+    return {
+        'status': 'ok',
+    }
+