cd-ing every time into the direcory of an app or package, you can just use the
run command. This executes the specified command in the directory of the specified app/package.
Example: List the directory content of your express-api
ctra run express-api ls
Note: For NPM commands,
npm can be left away. So when you for example want to install a new package, execute
ctra run express-api install cors
This installs the package
cors from NPM.