Merge branch 'feature/update-config-and-service-file' into 'master'

Update config and service file to take logging changes into account

See merge request !14

config.yml

@@ -6,3 +6,5 @@ database:
   password: icingadb
 redis:
   address: localhost:6380
+logging:
+  level: info

icingadb.service

@@ -3,7 +3,7 @@ Description=Icinga DB
 After=syslog.target network-online.target icingadb-redis.service mariadb.service
 
 [Service]
-Type=simple
+Type=notify
 ExecStart=/usr/sbin/icingadb --config /etc/icingadb/config.yml
 User=icingadb
 Group=icingadb