Configure FastAPI to serve React frontend static files

backend/app/main.py

@@ -24,6 +24,35 @@ def get_application() -> FastAPI:
     )
 
     app.include_router(api_router, prefix="/api")
+
+    # Serve static files (Frontend)
+    import os
+    from fastapi.staticfiles import StaticFiles
+    from fastapi.responses import FileResponse
+
+    # Determine absolute path to dist folder
+    # In Docker (WORKDIR /app), this is /app/frontend/dist
+    # Locally, it depends where we run from. We'll rely on relative path from root.
+    DIST_DIR = os.path.join(os.getcwd(), "frontend", "dist")
+
+    if os.path.exists(DIST_DIR):
+        app.mount("/assets", StaticFiles(directory=os.path.join(DIST_DIR, "assets")), name="assets")
+        
+        # Catch-all for SPA routing (must be last)
+        @app.get("/{full_path:path}")
+        async def serve_spa(full_path: str):
+            # If API request fell through to here, return 404
+            if full_path.startswith("api/"):
+                return {"detail": "Not Found"}
+            
+            # Use index.html for all other routes (SPA)
+            index_path = os.path.join(DIST_DIR, "index.html")
+            if os.path.exists(index_path):
+                return FileResponse(index_path)
+            return {"detail": "Frontend not found (build missing)"}
+    else:
+        print(f"⚠️ Frontend dist not found at {DIST_DIR}. Serving API only.")
+
     return app