install1804 fails to install nvm

[junukwon7]

install1804 fails to install nvm. Tested in multipass ubuntu18.04(Hyper-V) twice.
The script below didn't install nvm. With no output.
However, it worked after I install it manually.

echo "Installing NodeJS"
curl -o- https://cdn.jsdelivr.net/gh/nvm-sh/nvm@v0.36.0/install.sh | sed 's/raw.githubusercontent.com\/nvm-sh\/nvm\//cdn.jsdelivr.net\/gh\/nvm-sh\/nvm@/g' | bash
export NVM_DIR=/root/.nvm
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
nvm install 14

[undefined-moe]

please refer to https://github.com/nvm-sh/nvm/blob/master/README.md .
It's probably not a problem of hydro. please confirm you are running the script as root and nvm is installed to /root/.nvm (at least curl should output something)