feat(CI): Use docker main tag

See merge request !30

This filter is currently applied programmatically in the dashboard. It
makes much more sense to do this on a database level.

refs dashboard#246

refactor timeslot API filters

See merge request !28

These filters now support datetimes as well as dates and their naming
now reflects what they are querying.

The default values break some valid use cases and there’s no real value
in applying them by default.

refs #189

Closes: #185

fix(Dockerfile):  To avoid permsiions problems, we will set permission at dockerfile

See merge request !27

aura#251

Closes: #178

Closes: aura#251

Closes: 183

Closes: #180

Close: #164

This reverts commit 3c611393.