Get obidian live sync to work and add doc site

docs-site/README.md

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+Serves the generated MkDocs static output from `../site` using NGINX.
+
+Routing is handled by Traefik with host `docs.${DOMAIN}`.
+
+Deploy flow:
+1. Build docs: `make docs`
+2. Start container: `make up-docs-site` (or `make up`)

docs-site/docker-compose.yml

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+services:
+  docs-site:
+    image: nginx:alpine
+    container_name: docs-site
+    restart: unless-stopped
+    volumes:
+      - ../site:/usr/share/nginx/html:ro
+    networks:
+      - web
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.docs-site.entrypoints=websecure"
+      - "traefik.http.routers.docs-site.rule=Host(`docs.${DOMAIN}`)"
+      - "traefik.http.routers.docs-site.tls=true"
+      - "traefik.http.routers.docs-site.tls.certresolver=letsencrypt"
+      - "traefik.http.services.docs-site.loadbalancer.server.port=80"
+
+networks:
+  web:
+    external: true