Unable to execute

Let me know if you need to see the other 3

in that main.js, server url and app id have to be strings, to use " before and after

and you will also need to install metamask after that in order to work, and to enable it by clicking on it

how to make server url and app id strings , not familiar with ,
also I have metamask already unless it has to be done after the coding

I mean to have them in a form like “asdfasdfadsf” and not only afasdfasdfasdf

Just send or show me whatever it is you have I will make some sense out of them , I am eager and determined to get this done as I am sure you see by now. I have three fascinating NFTs that I had created and I have to get this dApp to start my NFT Marketplace so I can start minting, listing and marketing my NFT collection as I create it . Please help me to build My first dApp NFT Market Place . If possible collaborate with me going forward. Either way let me know . If you like I can show you my first three NFTs so you can see where I’m trying to go . let me know