docs: add information about the server

README.md

@@ -8,6 +8,16 @@
 # Peratorakka Server
 A server for any Peratorakka client.
 
+Peratorakka is a software system aimed to manage and track the finances, personal or commercial. It
+is made up of a client and server. In this repository, it has an implementation of the server which
+process the data and stores them in any compatible database. The database may be an instance of
+PostgreSQL server, MySQL server, or others as long as it is supported by CodeIgniter framework (it
+is framework that Peratorakka server builds on).
+
+There is no public server available right now, but it may happen in the future when the author has
+enough time. Yet, I still outlined the instructions below in case someone want to host an instance
+of Peratorakka server.
+
 ## Origin
 Some parts of the repository was based from [`filled_composer_json`] branch of [Web Template].