maybe these old topics of mine are help full for you:
- Recommend way to move owncloud-docker installation to new VServer
- Move owncloud from docker setup to nativ manual installation
back then i switched from a docker-setup to a manual-installation (don’t ask why… i do not remember… 
)
both have some infos on what to look for during moving / switching setups/servers…
and pleas let us know how it worked out!