command not found when starting express backend

[zilahir]

i am trying to use the react-express-mysql.

when hitting

docker compose build

and then

docker-compose up`

the frontend starts up correctly on the port 3000, however the express backend is not.

backend_1   |
backend_1   | > [email protected] start-watch
backend_1   | > nodemon src/index.js --inspect=0.0.0.0:9229
backend_1   |
backend_1   | sh: 1: nodemon: not found

Do you happen to know what might be a good fix for this?

Thanks in advance!