revert if-else for fastAPI app creation

src/argilla_server/_app.py

@@ -95,10 +95,14 @@ async def redirect_api():
     ]:
         app_configure(app)
 
-    _app = FastAPI(docs_url=None, redoc_url=None, openapi_url=None)
-    _app.mount(settings.base_url, app)
-
-    return _app
+    # This if-else clause is needed to simplify the test dependencies setup. Otherwise we cannot override dependencies
+    # easily. We can review this once we have separate fastapi application for the api and the webapp.
+    if settings.base_url and settings.base_url != "/":
+        _app = FastAPI(docs_url=None, redoc_url=None, openapi_url=None)
+        _app.mount(settings.base_url, app)
+        return _app
+    else:
+        return app
 
 
 def configure_middleware(app: FastAPI):