diff --git a/README b/README
new file mode 100644
index 0000000..9e96217
--- /dev/null
+++ b/README
@@ -0,0 +1,20 @@
+Ari
+> a discord music bot
+
+Ari is a simple music bot that communicates through reactions. You can
+click the :play: reaction it adds to messages with youtube videos or
+audio attachments to play its contents.
+
+When Ari fails to play a song, it adds a :download_error: reaction to the
+message. You can click the reaction to get details on which songs Ari wasn't
+able to play.
+
+It supports these commands:
+`/skip <number>` - skips the number of songs. The number is optional
+    and defaults to 1.
+`/stop` - tells Ari to disconnect.
+
+
+To run your own Ari instance clone this repository (link in the header),
+make sure you have docker and docker-compose installed, then fill in
+`BOT_TOKEN` in docker-compose.yml, and run the compose file.
diff --git a/ari/bot.py b/ari/bot.py
index 18e4504..8ce0d27 100644
--- a/ari/bot.py
+++ b/ari/bot.py
@@ -6,7 +6,7 @@ from discord import app_commands
 
 from .player import Player
 
-from .constants import BAINS_POSIT_NOTE, MUSIC_CACHE, Emoji
+from .constants import CACHE_SIZE, MUSIC_CACHE, Emoji
 from .messages import MessageHandler
 from .cache import Cache
 
@@ -25,7 +25,7 @@ class Bot(discord.Client):
         super().__init__(intents=intents)
         self.tree = app_commands.CommandTree(self)
         self.message_handler = MessageHandler(self)
-        self.music_cache = Cache(self.http, MUSIC_CACHE, max_size=300000000)
+        self.music_cache = Cache(self.http, MUSIC_CACHE, max_size=CACHE_SIZE)
         self.players: Dict[int, Player] = {}
 
     async def setup_hook(self) -> None:
diff --git a/ari/constants.py b/ari/constants.py
index 14f558d..21b0e98 100644
--- a/ari/constants.py
+++ b/ari/constants.py
@@ -1,8 +1,5 @@
 import os
 from typing import NamedTuple
-import discord
-
-BAINS_POSIT_NOTE = discord.Object(id=630144683359862814)
 
 
 class Emoji(NamedTuple):
@@ -15,3 +12,4 @@ class Emoji(NamedTuple):
 PRELOAD = bool(int(os.getenv("PRELOAD", "1")))
 MUSIC_CACHE = os.getenv("MUSIC_CACHE", "cache")
 BOT_TOKEN = os.getenv("BOT_TOKEN", "invalid")
+CACHE_SIZE = int(os.getenv("CACHE_SIZE", "300000000"))
diff --git a/docker-compose.yml b/docker-compose.yml
index 6f0bb2f..135bc39 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5,4 +5,11 @@ services:
     build: .
     environment:
       BOT_TOKEN: ""
+      # specify a cache dir
+      # MUSIC_CACHE: "cache"
+      # preload music in queue (disable if you have slow internet)
+      # PRELOAD: "1"
+      # max cache size in bytes
+      # CACHE_SIZE: 300000000
+
     tty: true