nginx.conf

# this file needs to be in /etc/nginx/conf.d/git-cdn.conf

# application version 1a (replace url by url of git-cdn-a)
upstream version_1a {
    server localhost:8000;
}

# application version 1b (optional)
upstream version_1b {
    server localhost:8001;
}

# This allows to implement Canary Updates
split_clients "${remote_addr}${date_gmt}" $appversion {

    # to test a new version, you can redirect 5% of the trafic by changing 100% in next line by 95%
    100% version_1a;
    *    version_1b;
}

server {
    listen 80 default_server;
    listen [::]:80 default_server;

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

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;

    # SSL part from https://ssl-config.mozilla.org/
    ssl_certificate /path/to/signed_cert_plus_intermediates;
    ssl_certificate_key /path/to/private_key;
    ssl_session_timeout 1d;
    ssl_session_cache shared:MozSSL:10m;  # about 40000 sessions
    ssl_session_tickets off;

    # curl https://ssl-config.mozilla.org/ffdhe2048.txt > /path/to/dhparam
    ssl_dhparam /path/to/dhparam;

    # intermediate configuration
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
    ssl_prefer_server_ciphers off;

    # HSTS (ngx_http_headers_module is required) (63072000 seconds)
    add_header Strict-Transport-Security "max-age=63072000" always;

    # OCSP stapling
    ssl_stapling on;
    ssl_stapling_verify on;

    # verify chain of trust of OCSP response using Root CA and Intermediate certs
    ssl_trusted_certificate /path/to/root_CA_cert_plus_intermediates;

    # replace with the IP address of your resolver
    resolver 127.0.0.1;

    # git-cdn specific part:

    location / {
        proxy_pass http://$appversion;
        proxy_set_header Host            $host;
        proxy_set_header X-Forwarded-For $remote_addr;

        # Important: git clones can be faily long, we need to increase the default timeouts
        proxy_read_timeout      3600;
        proxy_connect_timeout   3600;
        proxy_send_timeout      3600;
        proxy_request_buffering off;
        # for git [lfs] push
        client_max_body_size 200G;
    }
}