Add docs for Fastlane Match.

Author: alexsegura

FASTLANE_MATCH.md

@@ -0,0 +1,19 @@
+Using Fastlane Match to generate provisioning profiles
+------------------------------------------------------
+
+We use [Fastlane Match](https://docs.fastlane.tools/actions/match/) to generate provisioning profiles.
+
+To renew provisioning profiles, do the following:
+
+```sh
+cd ios/
+bundle exec fastlane match nuke
+bundle exec fastlane match appstore
+```
+
+You can add the `-a` option to generate provisioning profiles for other bundle identifiers.
+
+```sh
+bundle exec fastlane match appstore -a org.coopcycle.Naofood
+bundle exec fastlane match appstore -a org.coopcycle.Sicklo
+```