install mongodb follow this link: https://www.digitalocean.com/community/tutorials/how-to-install-mongodb-on-ubuntu-20-04
download go-ipfs
npm istall
cd app
npm install
cd ..
cd go-ipfs
sudo install.sh
ipfs init
ipfs config --json API.HTTPHeaders.Access-Control-Allow-Origin '["*"]'
ipfs config --json API.HTTPHeaders.Access-Control-Allow-Methods "[\"PUT\", \"POST\", \"GET\"]"
ipfs config --json API.HTTPHeaders.Access-Control-Allow-Credentials '["true"]'
ipfs daemon
ganache
check db status
sudo systemctl status mongod
add new account from ganache into metamask add account[9] into 2_deploy_contracts.js
truffle migrate
npm run dev
npm run start
go to ./app/src
truffle exec seed.js
truffle deploy --network ropsten
npm run dev
open Metamask -> setting -> advance -> reset account