How to install fnm, node and npm for all users (Debian)

[gui3]

Fnm installs itself and the node/npm versions in the $HOME directory (on Debian), but this makes the binaries only available to the user who installed fnm...
What is the preferred way of installing them for all users ?

I tried the following command with paths /usr/share (binary not available) and /bin (available in sudo only)

curl -fsSL https://fnm.vercel.app/install | bash -s -- --install-dir "/usr/share"

I also look at the FNM_DIR value of fnm env but fnm env --fnm-dir <my path> doesn't seem to set it forever

What would be your recommandations ?
Our need is to have fnm available for everyone (if it needs sudo, let it be) but most importantly to have node and npm available without sudo for everyone...

[pplmx]

I have the same requirement. Is there a way to do it?