Changed DB config settings

.env.example

@@ -9,16 +9,13 @@ NODE_ENV=development
 TOKEN=
 
 # Put database type here (mongo or postgres)
-DB=mongo
+DB_DRIVER=mongo
 
-# If you're using MongoDB, put the database URL here
-MONGO=mongodb://localhost:27017/esmBot
-
-# If you're using Postgres, fill in the needed info here
-PG_USER=esmbot
-PG_HOST=localhost
-PG_DB=esmbot
-PG_PORT=5432
+# Put the database connection URL here
+# Example for PostgreSQL:
+# DB=postgresql://esmbot@localhost:5432/esmbot
+# Example for MongoDB:
+DB=mongodb://localhost:27017/esmBot
 
 # Put snowflake ID of bot owner here
 OWNER=