fix: use dockerfile builder instead of nixpacks

Author: Hamza Shahid

Procfile

@@ -1,10 +1,6 @@
 [build]
-builder = "NIXPACKS"
-buildCommand = "npm install && npm run db:generate && npm run build"
+builder = "DOCKERFILE"
 
 [deploy]
-startCommand = "npm run db:deploy && npm run start:prod"
 restartPolicyType = "ON_FAILURE"
 restartPolicyMaxRetries = 10
-healthcheckPath = "/"
-healthcheckTimeout = 300