nginx conf to proxy carto tiles

nginx.conf

proxy_cache_path  /srv/user/cache levels=1:2 keys_zone=tiles-cache:8m max_size=500000m inactive=1000d;
proxy_temp_path   /srv/user/cache/tmp;

upstream openaip_backend {
    server  1.tile.maps.openaip.net;
    server  2.tile.maps.openaip.net;
    server  3.tile.maps.openaip.net;
}

upstream cartodb_backend {
    server  cartodb-basemaps-a.global.ssl.fastly.net;
    server  cartodb-basemaps-b.global.ssl.fastly.net;
    server  cartodb-basemaps-c.global.ssl.fastly.net;
}

server {
    server_name domain.fr;
    listen 443 ssl http2;
    listen [::]:443 ssl http2;

    ssl_certificate /etc/letsencrypt/live/domain.fr/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/domain.fr/privkey.pem;
    ssl_trusted_certificate /etc/letsencrypt/live/domain.fr/fullchain.pem;
    include /etc/nginx/snippets/ssl.conf;
    charset     utf-8;
    client_max_body_size 25M;

    include /etc/nginx/snippets/letsencrypt.conf;

    location ~ ^/tiles/openaip/(?<tile_path>.*)$ {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X_FORWARDED_PROTO http;
        proxy_set_header Host $http_host;
        proxy_cache tiles-cache;
        expires 3d;
        proxy_cache_valid  200 302  3d;
        proxy_cache_valid  404      1m;
        proxy_redirect off;
        if (!-f $request_filename) {
            proxy_pass http://openaip_backend/geowebcache/service/tms/1.0.0/openaip_basemap@EPSG:900913@png/$tile_path;
            break;
        }
    }

    location ~ ^/tiles/cartodb/(?<tile_path>.*)$ {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X_FORWARDED_PROTO http;
        # Not using $http_host otherwise this error is returned:
        # Fastly error: unknown domain: domain.fr.
        # Please check that this domain has been added to a service.
        proxy_set_header Host cartodb-basemaps-a.global.ssl.fastly.net;
        proxy_cache tiles-cache;
        expires 3d;
        proxy_cache_valid  200 302  3d;
        proxy_cache_valid  404      1m;
        proxy_redirect off;
        if (!-f $request_filename) {
            proxy_pass http://cartodb_backend/$tile_path;
            break;
        }
    }

}