add loki role and fix linter errors

roles/loki/README.md

@@ -0,0 +1,43 @@
+loki
+=========
+
+Installs Loki as a `systemd` service.
+
+Requirements
+------------
+
+Role Variables
+--------------
+
+```yaml
+loki_version: Loki version to be deployed
+loki_storage_path: where to put Loki's files, including log data and positions (default: /data/loki)
+loki_port: Loki will listen on this port (default: 3000)
+```
+
+Dependencies
+------------
+
+No
+
+Example Playbook
+----------------
+
+```yaml
+roles:
+  - role: loki
+    loki_version: 2.7.3
+```
+      
+
+License
+-------
+
+MIT
+
+Author Information
+------------------
+
+Alexander Gorelyshev (corvus-migratorius@proton.me) and Danila Danilkin
+
+Genlab LLC