trying other ports

app.py

@@ -207,6 +207,9 @@ def emojify(message):
 app = Flask(__name__)
 CORS(app) 
 
+if __name__ == "__main__":
+    app.run(port=5500)  
+
 @app.route('/getemoji', methods=['GET'])
 # @cross_origin()
 def get_random_emoji():

shell.nix

@@ -0,0 +1,15 @@
+with import <nixpkgs> {};
+
+mkShell {
+  buildInputs = [
+    python3
+    python3Packages.flask
+    python3Packages.flask-cors
+    python3Packages.gunicorn
+  ];
+
+  shellHook = ''
+    export LANG=C.UTF-8
+    export LC_ALL=C.UTF-8
+  '';
+}