Read database connection parameters from environment

src/pluralkit/bot/__init__.py

@@ -1,6 +1,7 @@
 import asyncio
 import json
 import logging
+import os
 import time
 from datetime import datetime
 
@@ -111,7 +112,13 @@ class PluralKitBot:
     async def run(self):
         try:
             self.logger.info("Connecting to database...")
-            self.pool = await db.connect()
+            self.pool = await db.connect(
+                os.environ["DATABASE_USER"],
+                os.environ["DATABASE_PASS"],
+                os.environ["DATABASE_NAME"],
+                os.environ["DATABASE_HOST"],
+                int(os.environ["DATABASE_PORT"])
+            )
 
             self.logger.info("Attempting to create tables...")
             async with self.pool.acquire() as conn:

src/pluralkit/db.py

@@ -11,10 +11,10 @@ from discord.utils import snowflake_time
 from pluralkit import System, Member, stats
 
 logger = logging.getLogger("pluralkit.db")
-async def connect():
+async def connect(username, password, database, host, port):
     while True:
         try:
-            return await asyncpg.create_pool(user="postgres", password="postgres", database="postgres", host="db")
+            return await asyncpg.create_pool(user=username, password=password, database=database, host=host, port=port)
         except (ConnectionError, asyncpg.exceptions.CannotConnectNowError):
             pass