open the terminal and write the command:
npm install
download the POSTMAN for sending request to add/mine the block in the blockchain
start the server for sending request and getting response of blockchain back
open the POSTMAN
create new http post request
http://localhost:3000/api/mine
Add the below data into the body in POSTMAN and hit ENTER
{data: "Adding new block"}
Now you will get the response of blockchain with all the blocks