Fix NVM install in default codespace

[Rulikkk]

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Bug

Body

nvm seems to be incorrectly installed in codespaces by default.

It needs to have code like this in ~/.bashrc (or alternatives)

export NVM_DIR="/usr/local/share/nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion

... but it doesn't.

As a result, each reconnect node is default version, not one selected via nvm — so nvm is constantly forgetting selected node version.

The quick fix is to run ~/nvm/install.sh which adds those lines and restart bash.

The proper fix would be to fix this in codespaces =)

Thank you.

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