feat(docker): add Dockerfile and deployment documentation for Coolify

[maurodesouza]

Hi 👋

This PR adds a production-ready Docker setup to simplify self-hosted deployments.

Changes

• Added Dockerfile
• Added .dockerignore
• Updated README with Docker deployment instructions

Motivation

Provides a stable and reproducible way to run the project outside platforms like Vercel, enabling easier self-hosting on dedicated servers.

Notes

• Uses a standard container build for consistent environments
• Instructions included in README for quick setup

All Submissions

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

New Feature Submissions

1. Does your submission pass tests?
2. Have you linted your code locally prior to submission?

Not applicable

Changes to Core Features

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully ran tests with your changes locally?

Not applicable

[vercel]

@maurodesouza is attempting to deploy a commit to the ashutosh00710's projects Team on Vercel.

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