Add analytics section to the appendix

Author: arafatiqbal

guides/appendix/analytics.md

@@ -0,0 +1,101 @@
+Ember-cli tracks data points related to the use of the Ember-cli tool. This information is used by the
+Ember and Ember-cli core teams to identify upgrade blockers, monitor build performance, and understand which
+features are being used. Users who are uncomfortable with this data collection can permanently disable it by
+updating their .ember-cli file.
+
+Ember-cli tracks (only) the following data points:
+
+- ember-cli version
+- build/rebuild/live-reload times
+- how many errors occurred
+
+**Note:** No personally identifying information is tracked, if something is
+being leaked please [disclose responsibly](https://emberjs.com/security)
+
+This information is used to:
+
+- See if there are upgrade blockers (users stuck on old version)
+- Have a broad idea for build performance (to make sure we don't regress, and how to prioritize)
+- See which high-level features are used (serve/test/build/generate etc.)
+- See an increase/decrease in error rates
+
+## Still Not comfortable?
+
+We understand! To permanently disable any analytics gathering you can update your project's `.ember-cli` file (or `$HOME/.ember-cli` for user-wide):
+
+```json
+{
+  "disableAnalytics": true
+}
+```
+
+## Who has access
+
+The ember and ember-cli core [teams](https://emberjs.com/teams/).
+These teams have been granted access to the analytics data in order to make informed decisions about the direction
+and future of the projects.
+
+## Links to each code-point where ember-cli emits tracking information
+
+### Command Name: To understand what high-level features are used
+
+- [ember-cli/lib/models/command.js](https://github.com/ember-cli/ember-cli/blob/2da9de596370c0e78ea0c0c3ffcd6a551d2863a9/lib/models/command.js#L277)
+
+```js
+this.analytics.track({
+  name: 'ember ',
+  message: this.name,
+});
+```
+
+### Build Error: The name of the error
+
+- [ember-cli/lib/models/watcher.js](https://github.com/ember-cli/ember-cli/blob/6ec50a1fd21d961f0b0e2ca4daf66a8e7dea6417/lib/models/watcher.js#L32-L34)
+
+```js
+this.analytics.trackError({
+  description: error && error.message,
+});
+```
+
+### Build/Rebuild Time: Can help identify areas of optimization
+
+- [ember-cli/lib/tasks/build.js](https://github.com/ember-cli/ember-cli/blob/503ede1fcb5224d54dc36f82af84550a91d90f26/lib/tasks/build.js#L33)
+
+```js
+analytics.track({
+  name: 'ember build',
+  message: `${totalTime}ms`,
+});
+```
+
+- [ember-cli/lib/tasks/build.js](https://github.com/ember-cli/ember-cli/blob/503ede1fcb5224d54dc36f82af84550a91d90f26/lib/tasks/build.js#L44)
+
+```js
+analytics.trackTiming({
+  category: 'rebuild',
+  variable: 'build time',
+  label: 'broccoli build time',
+  value: parseInt(totalTime, 10),
+});
+```
+
+### Live Reload
+
+- [ember-cli/lib/tasks/server/livereload-server.js](https://github.com/ember-cli/ember-cli/blob/503ede1fcb5224d54dc36f82af84550a91d90f26/lib/tasks/server/livereload-server.js#L167)
+
+```js
+this.analytics.track({
+  name: 'broccoli watcher',
+  message: 'live-reload',
+});
+```
+
+- [ember-cli/lib/tasks/server/livereload-server.js](https://github.com/ember-cli/ember-cli/blob/503ede1fcb5224d54dc36f82af84550a91d90f26/lib/tasks/server/livereload-server.js#L181)
+
+```js
+this.analytics.track({
+  name: 'express server',
+  message: 'live-reload',
+});
+```

guides/pages.yml

@@ -83,3 +83,5 @@
     url: 'common-issues'
   - title: 'Live reload integration'
     url: 'live-reload'
+  - title: 'Analytics'
+    url: 'analytics'