Add floof collaborator; traefik labels + service; rename .env.example->.env; opencloud.maukit.com entrypoints

- .env renamed (.env.example removed); domain -> opencloud.maukit.com / euro-office.opencloud.maukit.com
- docker-compose.yml: opencloud labels traefik (Host opencloud.maukit.com, websecure, letsencrypt); OC_URL updated
- traefik/service.yml: traefik v2.10.4 service matching floof/portainer style (docker.sock, ports 80/443/8080)
- Compare with floof/portainer traefik/docker-compose.yml: same label structure (enable=true, Host, entrypoints, tls.certresolver)
- floof added to repo (collaborator) per convention
- No deploy; reference only

docker-compose.yml

@@ -8,6 +8,11 @@ services:
     user: ${OC_CONTAINER_UID_GID:-1000:1000}
     networks:
       opencloud-net:
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.opencloud.rule=Host(`opencloud.maukit.com`)"
+      - "traefik.http.routers.opencloud.entrypoints=websecure"
+      - "traefik.http.routers.opencloud.tls.certresolver=letsencrypt"
     entrypoint:
       - /bin/sh
     # run opencloud init to initialize a configuration file with random secrets
@@ -17,7 +22,7 @@ services:
     environment:
       # enable services that are not started automatically
       OC_ADD_RUN_SERVICES: ${START_ADDITIONAL_SERVICES}
-      OC_URL: https://${OC_DOMAIN:-cloud.maukit.com}${TRAEFIK_PORT_HTTPS:+:${TRAEFIK_PORT_HTTPS:-}}
+      OC_URL: https://${OC_DOMAIN:-opencloud.maukit.com}${TRAEFIK_PORT_HTTPS:+:${TRAEFIK_PORT_HTTPS:-}}
       OC_LOG_LEVEL: ${LOG_LEVEL:-info}
       OC_LOG_COLOR: "${LOG_PRETTY:-false}"
       OC_LOG_PRETTY: "${LOG_PRETTY:-false}"