DevOps: Start dev server as current prod server to test some new features before prod

[ElenaSpb]

current pipeline run here https://github.com/Brain-up/brn/actions
scripts are here https://github.com/Brain-up/brn

ask creds to selectel (vscale panel) - ask Elena Moshnikova

config BrainUp-dev server: prepare scripts/pipeline to make on dev server same behavior as now on prod: on each MR, commit into master - redeploy server at the end of pipeline

server run here