adding filebrowser role

ansible/roles/filebrowser/templates/settings.json.j2

@@ -0,0 +1,8 @@
+{
+  "port": {{ fb_port }},
+  "baseURL": "",
+  "address": "{{ fb_address }}",
+  "log": "{{ fb_log_dir }}/filebrowser.log",
+  "database": "{{ fb_config_dir }}/filebrowser.db",
+  "root": "{{ fb_root }}"
+}