Review OVPSync and make sure it's working well

[donut]

• consider saving/committing changes to separate branch
• revert changes
• start new branch
• look for workable opam and/or dune dockerfile: https://hub.docker.com/r/ocaml/opam
• setup local, basic Dockerfile
• run new dockerfile
• ssh into new container
• setup opam
• setup dune
• add packages from package.json (alternatively, try compiling and add packages as they're found missing)
• update app Makefile to work with opam & dune
• get application to running state
• add stages to dockerfile for dev and production
• test out
• clear out remaining esy trappings
• get running on production
  • rebuild production server (https://github.com/RightThisMinute/zartron9/issues/1)
  • Handle multiple data locations #4
• look through prod log for problems
• address found problems
• look into upgrading OCaml and OPAM packages
• for videos that require a passthrough, tag them with "Passthrough by OVPSync" (check that follows the convention we've been using)

[donut]

This might be a good admin solution:
https://www.getmotoradmin.com
http://hn.premii.com/#/comments/29080790

[donut]

I'm having trouble getting the project to compile. While I'm not sure that the root of the issue is the esy build system, I plan to move to straight opam & dune instead. Hoping that going through that transition will help weed out the issues I'm having.

For the long term, I think this is a good move. As much as I appreciate the convenience of esy when it's working, I'm sure that a more typical setup with opam and dune will have more resources online for troubleshooting.

[donut]

The migration of opam/dune from esy is basically done. Only thing left to do is test it on production and fill out the stages in the Dockerfile. Definitely a good move. esy was too much of a black box.

[donut]

So... the production server has run out of space. The solution will be to use multiple external storage devices. To accommodate this setup, OVPSync will need to be modified to handle multiple data destinations.