Launch a terminal emulator, e.g. Terminator, iTerm2 or VS Code's Integrated Terminal, and enter this:
mkdir my-first-backend_19820_x918te
cd my-first-backend_19820_x918te
git clone https://git.us.qwasar.io/my-first-backend_19820_x918te/my-first-backend
cd my-first-backend
npm init -y
npm i express
npm install -g npmnode ./app.jssh script.shnode ./app.jscurl -i localhost:8000node ./app.jscurl -i localhost:8000/birth_datecurl -i localhost:8000/birth_citycurl -i localhost:8000/wivescurl -i localhost:8000/picturenode ./app.jscurl -i http://localhost:8000/publiccurl -i http://localhost:8000/protectedcurl -i http://admin:admin@localhost:8000/protectedcurl -i http://user:password@localhost:8000/protectedcurl -i http://iamgoingtobeabillionaire:markmywords@localhost:8000/protected