docs(readme): add docs on functions

readme.md

@@ -1,13 +1,34 @@
 # GitHub Bot for UWP Toolkit
 
-Bot written in node.js to manage issues and Pull Requests of UWP Community Toolkit repository
+Bot written in node.js and hosting on Azure Functions to manage issues and Pull Requests of UWP Community Toolkit repository
+
+## List of functions
+
+### noResponseFromCommunityOnIssues
+
+This function detects issues without response.
+It automatically send a message to a member of the team.
+
+### closeInactiveIssues
+
+This function detects inactive issues (a discussion has already started but no one started to work or closed the issue).
+
+The first time (X days after the last message), an alert/message is sent.
+The second time, another alert/message is sent.
+And the third time, the issue is closed
+
+### unclosedIssuesInMergedPr
+
+This function listens a GitHub webhook event when a PR is merged.
+Then, using the `pull_request` it will detect the linked issues that are not closed and send a message with the id/number of issues left open.
 
 ## How to use?
 
 1. First, build the project using `tsc` command line.
     * Note: if you do not have `tsc` installed, execute `npm install -g typescript`
 2. Fill the required environment variables to launch the bot (see next section)
-3. Execute `node index` command line to start the bot
+3. Open the folder related to the function you want to execute
+4. Execute `node index` command line to start the bot function
 
 ## Environment variables
 
@@ -20,5 +41,5 @@ These environment variables should be set to launch the bot.
 | GITHUB_BOT_UWP_TOOLKIT_REPO_OWNER             | Target Repository owner (should be "Microsoft") |
 | GITHUB_BOT_UWP_TOOLKIT_REPO_NAME              | Target Repository name (should be "UWP Community Toolkit") |
 | GITHUB_BOT_UWP_TOOLKIT_ACTIVATE_MUTATION      | Activate GitHub mutation calls (false by default) |
-| NUMBER_OF_DAYS_WITHOUT_ACTIVITY               | Number of days without activity to check on `closeInactiveIssues` function |
-| NUMBER_OF_DAYS_WITHOUT_RESPONSE               | Number of days without response to check on `noResponseFromCommunityOnIssues` function |
+| NUMBER_OF_DAYS_WITHOUT_ACTIVITY               | Number of days without activity to check on `closeInactiveIssues` function (7 days by default) |
+| NUMBER_OF_DAYS_WITHOUT_RESPONSE               | Number of days without response to check on `noResponseFromCommunityOnIssues` function (7 days by default) |