Deploy JupyterHub 3 in tljh

JupyterHub The Littlest JupyterHub
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I assume you mean deploy JupyterLab 3 on TLJH? (According to here the current release of JupyterHub is version 1.3.)

Another discourse post here recently discussed trying this pull request with no luck. Doesn’t say if they were on AWS or not though.