Create app.py

app.py

@@ -0,0 +1,36 @@
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+app = FastAPI(title="FonsFlip API")
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],  # later lock to github.io
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# Health check
+@app.get("/")
+def root():
+    return {"status": "FonsFlip backend running"}
+
+# Listings (mock for now)
+@app.get("/listings")
+def listings():
+    return [
+        {
+            "id": 1,
+            "title": "Jordan 4 Retro Black Cat",
+            "price": 620,
+            "location": "Boston, MA",
+            "image": "https://images.unsplash.com/photo-1600185365483-26d7a4cc7519?w=600"
+        },
+        {
+            "id": 2,
+            "title": "Supreme Box Logo Hoodie",
+            "price": 380,
+            "location": "Cambridge, MA",
+            "image": "https://images.unsplash.com/photo-1521335629791-ce4aec67dd47?w=600"
+        }
+    ]