Add min time interval support for SQL datasources

make default values for alerting configurable

[skip ci]

[skip ci]

docs: default paths in the docker container.

upgrade to golang 1.11

* auth: never authenticate passwords shorter than 4 chars.

* auth: refactoring password length check.

* auth: does not authenticate when password is empty.

* auth: removes unneccesary change.

Fix error when new variables created but not yet added/saved

* created react component and moved markdown

* extracting components

* Broke out parts into components

* tests

* Flattened file structure

* Tests

* made instances typed in test

* typing

* function instead of variable

* updated user model with missing properties

* added full set of properties to user mock

* redone from variable to function

* refactor: minor refactorings of #13091

* removed logging