nginx: fix inconsistencies in certbox public file directory

Some where referring to /var/www/html, some to /var/www/certbot: now everything should be in /var/www/html,
that should fix certificate renewal

docker-compose.yml

@@ -69,7 +69,7 @@ services:
       - ./nginx/templates:/etc/nginx/templates/
       - ./nginx/snippets:/etc/nginx/snippets
       - inventaire-server:/opt/inventaire
-      - certbot-www:/var/www/certbot
+      - certbot-www:/var/www/html
       - ./certbot/conf:/etc/letsencrypt
       - nginx-cache:/tmp/nginx
     env_file: .env
@@ -81,9 +81,9 @@ services:
     image: certbot/certbot:latest
     volumes:
       - ./certbot/conf:/etc/letsencrypt
-      - certbot-www:/var/www/certbot
+      - certbot-www:/var/www/html
     restart: unless-stopped
-    entrypoint: /bin/sh -c "trap exit TERM; while :; do certbot renew --webroot -w /var/www/certbot; sleep 12h & wait $${!}; done;"
+    entrypoint: /bin/sh -c "trap exit TERM; while :; do certbot renew --webroot -w /var/www/html; sleep 12h & wait $${!}; done;"
     depends_on:
       - nginx