Cannot playback live when using nginx in front of the docker nginx

Using docker image (deamos/openstreamingplatform:latest, sha256 0b5013a892c7)

I've found #102 (closed) and adapted my config a bit (see below) but I can't get playback to work.

Urls in /live-rec/... (or even the adaptive ones) ends up in 404 Not Found.

Is there a special trick to do to get it to work ?

server {
        listen       x:80;
        listen       [x]:80;
        server_name     x.sh;

        access_log /var/log/nginx/x.sh.access.log;
        error_log /var/log/nginx/x.sh.error.log;

        location / { return 301 https://$host$request_uri; }
}

server {
        listen       x ssl http2;
        listen       [x]:443 ssl http2;
        server_name     x.sh;

        ssl_certificate      /srv/letsencrypt/certs/x.sh/fullchain.pem;
        ssl_certificate_key  /srv/letsencrypt/certs/x.sh/privkey.pem;

        # Security hardening (as of 11/02/2018)
        ssl_protocols TLSv1.2; # TLSv1.3, TLSv1.2 if nginx >= 1.13.0
        ssl_prefer_server_ciphers on;
        ssl_ciphers 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256';
# ssl_ecdh_curve secp384r1; # Requires nginx >= 1.1.0, not compatible with import-videos script
        ssl_session_timeout  10m;
        ssl_session_cache shared:SSL:10m;
        ssl_session_tickets off; # Requires nginx >= 1.5.9
        ssl_stapling on; # Requires nginx >= 1.3.7
        ssl_stapling_verify on; # Requires nginx => 1.3.7

        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload";

        client_max_body_size 8G;

        access_log /var/log/nginx/x.sh.access.log;
        error_log /var/log/nginx/x.sh.error.log;

        location / {
                proxy_redirect off;

                proxy_set_header   Host                 $host;
                proxy_set_header   X-Real-IP            $remote_addr;
                proxy_set_header   X-Forwarded-For      $proxy_add_x_forwarded_for;
                proxy_set_header   X-Forwarded-Proto    $scheme;

                proxy_set_header X-NginX-Proxy true;
                proxy_pass http://10.0.0.138;
        }


        location /socket.io {
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header Host $host;

                proxy_set_header X-NginX-Proxy true;

                # prevents 502 bad gateway error
                proxy_buffers 8 32k;
                proxy_buffer_size 64k;

                proxy_redirect off;

                # enables WS support
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";

                proxy_pass http://10.0.0.138/socket.io;
        }
}