koyeb has a hobby tier (or at least had before they joined mistral,0.1Vcpu ,512MB).
If you want to save config after restart you have to mount volume with the following path <hostPAth>:/app/db.
run.claw.cloud also provides free credits and option to mount volume,so you can try that
run.claw.cloud also provides free credits and option to mount volume,so you can try that