./bin/watch-storefront.sh missing

I am following the Shopware 6 frontend course - In the lesson about compiling a shell command is being used to activate a watcher and develop in a smoother way (without having to start the code compiling for each change).

My problem is that when I run
./bin/watch-storefront.sh

I get:

bash: ./bin/watch-storefront.sh: No such file or directory

Why am I missing this command, does anybody have a clue?

I did find a solution I did check between the psh.phar commands and found a storefront:hot-proxy command.

during execution I received the following error:

        Browserslist: caniuse-lite is outdated. Please run:
        npx browserslist@latest --update-db

So I installed the browserlist npm package,
updated it by running:

        Browserslist: caniuse-lite is outdated. Please run:
        npx browserslist@latest --update-db

And finally I executed the ./psh.phar storefront:hot-proxy successfully.