RE: Installing AppSmith on a Raspberry Pi 4 (with a twist named Directus)

Which RPi did you use?
It would be near to impossible with the RPi3, but with the RPi4 8GB, it runs perfectly!
There's a big difference between those two versions. The RPi3 was ok as a server if you had very light applications running on it, but most on-the-shelf apps require at least 1GB.
The RPi4 is blazing fast in comparison and with that much RAM you can do almost whatever you want.