[feature] Where could I put my liveblock public key

[Numeross]

in guide/development.md this is written :

Note: The multiplayer examples and endpoints currently require an API key from Liveblocks, however the storage services that are used in tldraw are currently in alpha and (as of November 2021) not accessible to the general public. You won't be able to authenticate and run these parts of the project.

Is it still true ? Now that I have a liveblock key, where could I put it ?

[Numeross]

ooh it's an environment variable, so export LIVEBLOCKS_PUBLIC_API_KEY=mykey in bash