Fermented foods, psyllium husk, non-strict intermittent fasting and strength training will get you like 80% of the way there while still being able to enjoy sitting at your computer for 8+ hours a day.
I personally really enjoyed this discussion on this between Andrew Huberman and Justin Sonnenberg (Professor of Microbiology & Immunology at Stanford University): https://www.youtube.com/watch?v=ouCWNRvPk20
Huberman's prior episode is also great: https://www.youtube.com/watch?v=15R2pMqU2ok
Basic takeaway was low sugar fermented food 4-6 times daily. Doable for almost everyone, palate aside.