From the root folder, launch truffle compile. If for some reason you want to force the compilation of unchanged files, use the --compile-all option.
From the root folder, launch truffle migrate. If you want to reset an existing deployment, use the --reset option.
Ganache is a local node with a GUI that can be used instead of the truffle. A ganache node is already defined in truffle-config.js. To connect to it, use truffle console --network ganache.
There is a demo of the dApp and contract at cryptowars.fun.
You need to pass your private key in the url. THIS IS NOT PRODUCTION READY. To make it simple to use the app on a mobile phone, the code doesn't use Metamask. If you deploy a contract in production, use something like Metamask.
To launch the dApp, use the following pattern:
http://cryptowars.fun?account=YOUR_PRIVATE_KEY
This code is for demonstration purposes only. Don't use this in production as is.