new .env file

[mfused]

dear sir,
what is xxxxxx in 6th line of .env file?
google clientID?

i can run project on localhost only with our old .env file
(like you showed in lecture), but new one generates errors!?

also, when i try my project locally,
on localhost 8080 i get:
Cannot GET/
in the html body

is that somehow ok?!

then i run localhost on 3000 and it does open, luckily,
but with tons of react errors, as your scripts are old,
and there need to be a lot of cleaning.

Finally, I bought your mern-react-node-aws course,
and i prefer this project (social network) to 'links project'.
Would the process be the same for putting this one on AWS?
Thanx