Add Seafile service and update Caddyfile

- seafile/: docker compose setup (seafile-mc 13, mariadb, redis, seadoc, caddy-proxy)
- Expose seafile on 127.0.0.1:8078, proxied via Caddy at docs.alogins.net
- Fix: SEAFILE_SERVER_PROTOCOL=https to avoid CSRF errors
- Fix: TIME_ZONE=Asia/Dubai (Etc/UTC+4 was invalid)
- Caddyfile: add docs.alogins.net → localhost:8078
- .gitignore: exclude seafile/.env (credentials stored in Vaultwarden)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

seafile/caddy.yml

@@ -0,0 +1,26 @@
+services:
+
+  caddy:
+    image: ${SEAFILE_CADDY_IMAGE:-lucaslorentz/caddy-docker-proxy:2.9-alpine}
+    restart: unless-stopped
+    container_name: seafile-caddy
+    ports:
+      - 8077:80
+      - 4433:443
+    environment:
+      - CADDY_INGRESS_NETWORKS=seafile-net
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+      - ${SEAFILE_CADDY_VOLUME:-/opt/seafile-caddy}:/data/caddy
+    networks:
+      - seafile-net
+    healthcheck:
+      test: ["CMD-SHELL", "curl --fail http://localhost:2019/metrics || exit 1"]
+      start_period: 20s
+      interval: 20s
+      timeout: 5s
+      retries: 3
+
+networks:
+  seafile-net:
+    name: seafile-net