1) su - invidious, cd into invidious dir
2) git pull
3) shards install --production
4) CRYSTAL_WORKERS=12 crystal build  src/invidious.cr --release --progress  --verbose 
5) if there are changes to config/config.example.yml diff it with config/config.yml and add new values where necessary.
6) go back to tilserv root user, systemctl restart invidious.