Initial Docker setup, fix #2

[michielbdejong]

No description provided.

[michielbdejong]

I'll use the tip from cs3org/reva#1766 (comment) to make the revad container easier to debug in development

[michielbdejong]

To do:

• confirm if nc-sciencemesh app is actually activated on http://dockerbak/settings/apps
• build reva with our added storage backend
• configure reva to use our added storage backend
• make a call to reva that triggers a storage backend action
• see it call a http endpoint on the nextcloud container

[michielbdejong]

for nc-sciencemesh app enable, I created #7 as a follow-up

[michielbdejong]

for reva storage backend I created this follow-up: #8

[michielbdejong]

Got something building and starting up now for both nextcloud and revad, and both have our customized code included.

Both also encounter an error when starting up, but created two separate follow-up issues for that.