chore(development): fix debugger command in README

[machikoyasuda]

Impact: minor
Type: developer happiness

Issue

The command in the README currently doesn't work.

Solution

Remove babel-node and use node instead, like the current yarn start script does.

Testing

1. Try docker-compose run --rm --publish 9229:9229 --publish 4000:4000 -e NODE_ENV=development web babel-node --inspect=0.0.0.0:9229 ./src/server.js and confirm it doesnt work.
2. Try docker-compose run --rm --publish 9229:9229 --publish 4000:4000 -e NODE_ENV=development web node --inspect=0.0.0.0:9229 ./src/server.js instead.

[focusaurus]

👍