Update app.py

app.py

@@ -1,9 +1,7 @@
-from flask import Flask
-app = Flask(__name__)
+from fastapi import FastAPI
 
-@app.route("/")
-def hello():
-    return "<h1>Hello, Docker! My deployment is working!</h1>"
+app = FastAPI()
 
-if __name__ == "__main__":
-    app.run(host="0.0.0.0", port=8080)
+@app.get("/")
+def greet_json():
+    return {"Hello": "World!"}