Added basic monica docker deployment.
A key which is required for monica is automatically generated on
deployment.
Optionally, geolocation and weather api can be enabled.
Mail-sending functionality is disabled by default but can be enabled
with any compatible smtp server set up.
Contains default credentials but these should be overwritten with
group or host -destined variables.
Add default credentials
Hide real credential files from git
Differentiated between both.
Development environment takes place locally, most directly through the
use of a vagrant machine on the development machine.
Staging environment mimics the final production environment, but is
situated on another server and, most probably, points to a different
address. Otherwise, however, it translates much more closely (dns
entries etc) to the production setup.
Production is just that, the final deployment.
