Add postgres information to README.md

README.md

@@ -91,7 +91,7 @@ Where `path` represents where you want the files stored
 
 ### Redis
 
-To use redis storage you must install the redis package in npm
+To use redis storage you must install the `redis` package in npm
 
 `npm install redis`
 
@@ -106,6 +106,28 @@ Once you've done that, your config section should look like:
 }
 ```
 
+### Postgres
+
+To use postgres storage you must install the `pg` package in npm
+
+`npm install pg`
+
+Once you've done that, your config section should look like:
+
+``` json
+{
+  "type": "postgres",
+  "connectionUrl": "postgres://user:password@host:5432/database
+}
+```
+
+You can also just set the environment variable for `DATABASE_URL` to your database connection url.
+
+Lastly, you will have to manually add a table to your postgres database:
+
+`create table entries (id serial primary key, key varchar(255) not null, value text not null, expiration int, unique(key));`
+
+
 You can also set an `expire` option to the number of seconds to expire keys in.
 This is off by default, but will constantly kick back expirations on each view
 or post.