Improve installation instructions

scripts/queries/most-played.sql

@@ -1,5 +1,6 @@
 --  select t.name as track, a.name as artist
-select substring(t.name for 50) as track, a.name as artist, count(t.id)
+select distinct on (1)
+timestamp, substring(t.name for 50) as track, a.name as artist
 from api_history as h
 join api_track as t
 on h.track_id = t.id
@@ -7,6 +8,6 @@ join api_track_artists ta
 on ta.track_id = t.id
 join api_artist a
 on a.id = ta.artist_id
-group by t.id, a.id
-order by count(t.id) desc;
---  limit 10;
+order by timestamp desc
+--  ;
+limit 20;