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README.md

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+# carddav-proxy
+
+CardDAV Proxy mit einfacher Weboberfläche für Kontaktsuche (z. B. Zoho CardDAV).
+
+## Features
+
+- `/api/search?q=...` für Kontakt-Suche
+- Web UI unter `/`
+- Zugangsdaten nur über Environment Variables
+
+## Environment
+
+- `PORT` (default `8096`)
+- `CARDDAV_URL` (Addressbook URL)
+- `CARDDAV_USERNAME`
+- `CARDDAV_PASSWORD`
+
+## Lokaler Start
+
+```bash
+npm install
+CARDDAV_URL=... CARDDAV_USERNAME=... CARDDAV_PASSWORD=... npm start
+```
+
+## Docker
+
+```bash
+docker build -t registry.aquantico.lan/carddav-proxy:latest .
+docker run --rm -p 8096:8096 \
+  -e CARDDAV_URL='https://.../addressbooks/default/' \
+  -e CARDDAV_USERNAME='...' \
+  -e CARDDAV_PASSWORD='...' \
+  registry.aquantico.lan/carddav-proxy:latest
+```
+
+## Portainer Stack (Copy/Paste)
+
+```yaml
+services:
+  carddav-proxy:
+    image: registry.aquantico.lan/carddav-proxy:latest
+    container_name: carddav-proxy
+    restart: always
+    networks:
+      - traefik
+    environment:
+      - PORT=8096
+      - URL=https://contacts.zoho.eu/carddav/v1/principals/<user>/addressbooks/default/
+      - NAME=your-zoho-login
+      - PASSWORD=your-zoho-app-password
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.carddav-proxy.rule=Host(`carddav-proxy.aquantico.lan`)"
+      - "traefik.http.routers.carddav-proxy.entrypoints=websecure"
+      - "traefik.http.routers.carddav-proxy.tls=true"
+      - "traefik.http.services.carddav-proxy.loadbalancer.server.port=8096"
+      - "traefik.docker.network=traefik"
+
+networks:
+  traefik:
+    external: true
+```
+
+Hinweis: Der Proxy unterstützt sowohl `URL/NAME/PASSWORD` als auch `CARDDAV_URL/CARDDAV_USERNAME/CARDDAV_PASSWORD`.