Feature Request: Add self-hosted mode with Docker and official image

[Yuss9]

First off, thanks a lot for this awesome habit tracker 🙌 It's super useful and well-designed!

I'd love to be able to self-host the app — especially to run it on my own server or NAS (for privacy, offline access, and full control).

Feature request:
Provide a self-hosted deployment option using:

• A Dockerfile or docker-compose.yml
• An official Docker image (published to Docker Hub or GitHub Container Registry)

Why it's useful:

• Great for users who want to run it privately or offline
• Easily deployable on homelabs, Raspberry Pi, VPS, etc.
• Makes it compatible with reverse proxies (e.g. Nginx, Traefik) and dashboards (like gethomepage.dev)

Optional bonus:

• Ability to persist data via volume mounts
• Configuration via environment variables or config file

Best regards,
Yuss

[sebastian-raubach]

+1 from me. Currently, it's not clear to me where the data will be held and I'd much prefer self-hosting a version of this on my Raspberry Pi.