Introduce Daymark public edition with isolated deployment configuration

README.md

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+# Daymark
+
+A self-hosted, multi-user diary for days, places, people, and ideas.
+
+Daymark combines Markdown journaling, photos and media, maps, calendar and timeline views, search, sharing, account exports, and administration. It includes password authentication, TOTP, passkeys, and an installable web app.
+
+## Run with Docker
+
+1. Copy `.env.example` to `.env`.
+2. Set three different strong random secrets in `.env`.
+3. Run `docker compose up -d --build`.
+4. Open `http://localhost:3000` and create your first account.
+
+The first account becomes administrator. The included Mailpit development inbox is available on port 8025. Configure production email and HTTPS before making an installation available online; set `COOKIE_SECURE` to `true` behind HTTPS.
+
+PostgreSQL, media storage, mail, and backups use Compose-project-scoped volumes. Use a distinct project name for every installation. Never point a test or public instance at another installation's database or volumes.
+
+`docker-compose.standalone.yml` is an equivalent portable configuration. See [deployment instructions](DEPLOYMENT.md).
+
+## Development
+
+Use Node.js 22 or later. Run `npm ci` and `npm run build` to build the frontend. `npm run dev` starts Vite; the backend requires the database and storage configuration supplied by Docker Compose.
+
+## Repositories
+
+- [GitHub](https://github.com/donishki/Daymark)
+- [Gitea](https://git.ptbox.org/dasp/Daymark)
+
+This public edition starts with clean source history. Personal deployment configuration and diary contents are excluded. Database and media content live in deployment volumes, not this source repository.
+
+Legacy storage keys and export identifiers are retained for compatibility with existing backups.
+
+## License
+
+No open-source license has been selected. All rights reserved until a license is added.