List all commands

[ci skip]

doc/integration/chat_commands.md

@@ -0,0 +1,14 @@
+# Chat Commands
+
+Chat commands allow user to perform common operations on GitLab right from there chat client.
+Right now both Mattermost and Slack are supported.
+
+## Available commands
+
+The trigger is configurable, but for the sake of this example, we'll use `/trigger`
+
+* `/trigger help` - Displays all available commands for this user
+* `/trigger issue new <title> <shift+return> <description>` - creates a new issue on the project
+* `/trigger issue show <id>` - Shows the issue with the given ID, if you've got access
+* `/trigger issue search <query>` - Shows a maximum of 5 items matching the query
+* `/trigger deploy <from> to <to>` - Deploy from an environment to another

doc/project_services/slack_slash_commands.md

@@ -5,11 +5,12 @@
 Slack commands give users an extra interface to perform common operations
 from the chat environment. This allows one to, for example, create an issue as
 soon as the idea was discussed in chat.
-For all available commands try the help subcommand, for example: `/gitlab help`
+For all available commands try the help subcommand, for example: `/gitlab help`, 
+all review the [full list of commands](../integrations/chat_commands.md).
 
 ## Prerequisites
 
-A [team](https://get.slack.help/hc/en-us/articles/217608418-Creating-a-team) in Slack should be create beforehand, GitLab can not create it for you.
+A [team](https://get.slack.help/hc/en-us/articles/217608418-Creating-a-team) in Slack should be created beforehand, GitLab cannot create it for you.
 
 ## Configuration