Basically, the ACL configuration was very static and it was not allowed
to remove 'any', 'groups', 'users'. The application crashed when those
keys did not exist.
After this fix, every key is optional and replaced by a default value
for the app configuration to be complete and used by Authelia.
Later, a configuration validator will be implemented to detect issues
with configuration at startup.
Client and server now have their own tsconfig so that the transpilation is only
done on the part that is being modified.
It also allows faster transpilation since tests are now excluded from tsconfig.
They are compiled by ts-node during unit tests execution.
Clement Michaud