Dev question: BASE_URL and .env variable not being picked up

[kasisoft]

Hi there,

I wanted to run it-tools using a /ittools/ path prefix so I obviously configured the variable BASE_URL within a .env file I created.
This doesn't seem to work despite being explicitly supported vite.config.ts.
According to the documentation the use of process.env is incorrect here so I made corresponding changes in my own fork (see (vite.config.ts)[https://github.com/kasisoft/other-it-tools/blob/6098e6ddfa3109574e871db226b921abc97c1a39/vite.config.ts#L21C6-L21C57]) which fixes this at least for me.
However process.env is also used for package version so I assume I'm missing something as I'm not a frontend dev.
Can anyone confirm my issue or point me to a solution to fix it without using my custom changes?