npmHooks.npmBuildHook: mention dontNpmBuild if script fails to run

Changed files
+1
pkgs
build-support
node
build-npm-package
+1
pkgs/build-support/node/build-npm-package/hooks/npm-build-hook.sh
···
echo
echo "Here are a few things you can try, depending on the error:"
echo "1. Make sure your build script ($npmBuildScript) exists"
+
echo " If there is none, set `dontNpmBuild = true`."
echo '2. If the error being thrown is something similar to "error:0308010C:digital envelope routines::unsupported", add `NODE_OPTIONS = "--openssl-legacy-provider"` to your derivation'
echo " See https://github.com/webpack/webpack/issues/14532 for more information."
echo