Added option to .env to specify number of shards

.env.example

@@ -11,6 +11,8 @@ TOKEN=
 MONGO=mongodb://localhost:27017/esmBot
 # Put snowflake ID of bot owner here
 OWNER=
+# Put amount of needed shards here
+SHARDS=1
 
 ###########
 # Optional

utils/client.js

@@ -16,7 +16,7 @@ const client = new Client(process.env.TOKEN, {
     TYPING_START: true,
     USER_UPDATE: true
   },
-  maxShards: "auto",
+  maxShards: process.env.SHARDS,
   opusOnly: true
 });
 module.exports = client;