New structure

src/applications/web_app/utils/static.py

@@ -0,0 +1,15 @@
+from fastapi.staticfiles import StaticFiles
+
+from starlette.responses import Response
+from starlette.exceptions import HTTPException
+
+
+class SPAStaticFiles(StaticFiles):
+    async def get_response(self, path: str, scope) -> Response:
+        try:
+            return await super().get_response(path, scope)
+        except HTTPException:
+            if path.startswith("/api"):
+                raise
+
+            return await super().get_response("index.html", scope)