v0.12.7

Fixes

• Fixed: on Coolify the proxy service failed to start with "not a
  directory" on /etc/caddy/Caddyfile, because Coolify starts the
  services from a directory without the repository's files. dstack deploy setup now turns on Coolify's Preserve repository during
  deployment, and dstack deploy turns it on for an application set up
  before. For an application you set up by hand, turn it on in Coolify
  and deploy again.