Fix memory unit and server port message

Author: lionello

samples/nodejs-react-postgres/compose.yaml

@@ -13,7 +13,7 @@ services:
     deploy:
       resources:
         reservations:
-          memory: 1GiB
+          memory: 1g
     depends_on:
       - server
   server:

samples/nodejs-react-postgres/server/index.js

@@ -81,5 +81,5 @@ app.delete("/todos/:id", async (req, res) => {
 });
 
 app.listen(3010, () => {
-    console.log("server has started on port")
-})
+    console.log("server has started on port 3010")
+})