update some readme

README.md

@@ -1,10 +1,6 @@
 # mastodon Work In Progress!!!
 
-Welcome to your new module. A short overview of the generated parts can be found
-in the [PDK documentation][1].
-
-The README template below provides a starting point with details about what
-information to include in your README.
+This module install and manage Mastodon, Redis and PostgreSQL servers.
 
 ## Table of Contents
 
@@ -19,35 +15,25 @@ information to include in your README.
 
 ## Description
 
-Briefly tell users why they might want to use your module. Explain what your
-module does and what kind of problems users can solve with it.
-
-This should be a fairly short description helps the user decide if your module
-is what they want.
+Mastodon https://joinmastodon.org/ is a decrentralized social network using the ActivityPub protocol to federate.
+This module install and configure it with the required components (PostgreSQL and Redis).
 
 ## Setup
 
 ### What mastodon affects **OPTIONAL**
 
-If it's obvious what your module touches, you can skip this section. For
-example, folks can probably figure out that your mysql_instance module affects
-their MySQL instances.
-
-If there's more that they should know about, though, this is the place to
-mention:
-
-* Files, packages, services, or operations that the module will alter, impact,
-  or execute.
-* Dependencies that your module automatically installs.
-* Warnings or other important notices.
+This module will install PostgreSQL and Redis server.
 
 ### Setup Requirements **OPTIONAL**
 
-If your module requires anything extra before setting up (pluginsync enabled,
-another module, etc.), mention it here.
+You need to generate these secrets:
+- mastodon::db_password
+- mastodon::secret_key_base
+- mastodon::otp_secret
+- mastodon::vapid_private_key
+- mastodon::vapid_public_key
 
-If your most recent release breaks compatibility or requires particular steps
-for upgrading, you might want to include an additional "Upgrading" section here.
+You will need a host name registered in DNS.
 
 ### Beginning with mastodon