import asyncio, subprocess

async def docker_watchdog(cfg, notify, bot, chat_id):
    last = {}
    while True:
        for alias, real in cfg["docker"]["containers"].items():
            state = subprocess.getoutput(
                f"docker inspect -f '{{{{.State.Status}}}}' {real}"
            )
            if last.get(alias) != state:
                await notify(bot, chat_id, f"🐳 {alias}: {state}")
                last[alias] = state
        await asyncio.sleep(120)