Update Dockerfile

[puckk]

To avoid error:

npm ERR! Tracker "idealTree" already exists

npm ERR! A complete log of this run can be found in: npm ERR! /root/.npm/_logs/2022-11-22T20_38_08_989Z-debug.log

[CLAassistant]

All committers have signed the CLA.

[krejac]

Hi @puckk, could you sign the Contributor License Agreement, so this commit can get merged?

(I just tried manually changing the Dockerfile as you suggested and it seemed to work as expected.)

[puckk]

Ready!