Add PunktFri Flask landing page

- Landing page with hero, problemet, målgruppe, idé, disclaimer sections
- Signup form → SQLite + file log (navn, email, domæner, egne_ns, kommentar)
- /tak confirmation page
- /admin with HTTP Basic Auth
- /health endpoint
- Mobile-first minimal CSS, Danish throughout
- Honest 'under undersøgelse' framing — no premature organisational claims

README.md

@@ -0,0 +1,45 @@
+# PunktFri.dk
+
+Flask landing page for PunktFri — a Danish non-profit registrar initiative for self-hosters.
+
+## Setup
+
+```bash
+python3 -m venv .venv
+source .venv/bin/activate
+pip install -r requirements.txt
+python app.py
+```
+
+Visit `http://localhost:5000`
+
+## Environment variables
+
+| Variable | Default | Description |
+|----------|---------|-------------|
+| `PORT` | `5000` | Port to listen on |
+| `DATABASE` | `punktfri.db` | SQLite database path |
+| `LOG_FILE` | `signups.log` | Signup log file path |
+| `ADMIN_USER` | `admin` | Admin username |
+| `ADMIN_PASS` | `punktfri2024` | Admin password |
+
+Change `ADMIN_USER` and `ADMIN_PASS` before deploying publicly.
+
+## Routes
+
+- `/` — Landing page + signup form
+- `/tak` — Confirmation page after signup
+- `/admin` — Signup table (HTTP Basic Auth)
+- `/health` — Health check (returns `{"status": "ok"}`)
+
+## Data
+
+Signups are stored in two places:
+- **SQLite** (`punktfri.db`) — queryable, used by `/admin`
+- **Log file** (`signups.log`) — append-only plaintext log
+
+Both are created automatically on first run.
+
+## Admin
+
+Visit `http://localhost:5000/admin` and enter the credentials above.