How do projects work?

Question

git

I'm still learning, I need help
How do people in companies upload projects to servers? The front is written separately ( on
vuejs (vue-cli)) The server part is a
self-written cycling php
I am a full stack (conditionally)
My actions at the moment: then I do , , (push to the closed repository) then build all the files to the dist folder Then via ftp (yes, I saw that it's silly, that's why I'm asking this question) upload to the hosting 2-Server (a la api)% allocated a subdomain to project: dev.api.project.ru Then I change something
sudo npm run dev
git add .git commit -m "v_x.y.z"git push
npm run build
git add ., git commit -m "v_x.y.z", git push(pushed to another closed repository)
then I upload it via ftp to the hosting
In general, how can all this be optimized, and so as not to destroy what has already been done?