🧱 update CI workflow and remove alpinejs frontend files

devices-api/db.lua

@@ -1,6 +1,5 @@
 -- PostgreSQL connection pool using pgmoon
 local pgmoon = require("pgmoon")
-local cjson = require("cjson")
 
 local DB_HOST = os.getenv("DB_HOST") or "localhost"
 local DB_PORT = tonumber(os.getenv("DB_PORT")) or 5432