README.md in gitlab-triage-0.5.0 vs README.md in gitlab-triage-0.6.0

@@ -50,11 +50,11 @@
           labels:
             - needs attention
           mention:
             - markglenfletcher
           comment: |
-            This issue is unlabelled after 5 days. It needs attention.
+            {{author}} This issue is unlabelled after 5 days. It needs attention.
   merge_requests:
     rules:
       []
 ```
 
@@ -327,29 +327,59 @@
 
 ##### Comment action
 
 Adds a comment to the resource.
 
-Accepts a string.
+Accepts a string, and placeholders. Placeholders should be wrapped in double
+curly braces, e.g. `{{author}}`.
 
-Example:
+The following placeholders are supported:
 
+- `created_at`: the resource's creation date
+- `updated_at`: the resource's last update date
+- `closed_at`: the resource's closed date (if applicable)
+- `merged_at`: the resource's merged date (if applicable)
+- `state`: the resources's current state: `opened`, `closed`, `merged`
+- `author`: the username of the resource's author as `@user1`
+- `assignee`: the username of the resource's assignee as `@user1`
+- `assignees`: the usernames of the resource's assignees as `@user1, @user2`
+- `closed_by`: the user that closed the resource as `@user1` (if applicable)
+- `merged_by`: the user that merged the resource as `@user1` (if applicable)
+- `milestone`: the resource's current milestone
+- `labels`: the resource's labels as `~label1, ~label2`
+- `upvotes`: the resources's upvotes count
+- `downvotes`: the resources's downvotes count
+
+If the resource doesn't respond to the placeholder, or if the field is `nil`,
+the placeholder is not replaced.
+
+Example without placeholders:
+
 ```yml
 actions:
   comment: |
     Closing this issue automatically
 ```
 
+Example with placeholders:
+
+```yml
+actions:
+  comment: |
+    @{{author}} Are you still interested in finishing this merge request?
+```
+
 ### Usage
 
 ```
 Usage: gitlab-triage [options]
 
     -n, --dry-run                    Don't actually update anything, just print
     -f, --policies-file [string]     A valid policies YML file
     -p, --project-id [string]        A project ID or path
     -t, --token [string]             A valid API token
+    -H, --host-url [string]          A valid host url
     -d, --debug                      Print debug information
     -h, --help                       Print help message
         --init                       Initialize the project with a policy file
         --init-ci                    Initialize the project with a .gitlab-ci.yml file
 ```
@@ -375,9 +405,24 @@
   only:
     - schedules
 ```
 
 > Note: You can use the [`--init-ci`](#usage) option to add an example [`.gitlab-ci.yml` file](support/.gitlab-ci.example.yml) to your project
+
+#### Can I use gitlab-triage for my self-hosted GitLab instance?
+
+Yes, you can override the host url using the following options:
+
+##### CLI
+```
+gitlab-triage --dry-run --token $API_TOKEN --project-id gitlab-org/triage --host-url https://gitlab.host.com
+```
+
+##### Policy file
+```yml
+host_url: https://gitlab.host.com
+resource_rules:
+```
 
 ### Contributing
 
 Please refer to the [Contributing Guide](CONTRIBUTING.md)