index-classic.html ignores defined server list

Description

index-classic.html doesn't get my server-list.json even though I have it in place per the documentation

Server

running on raspberry os inside docker container using alpine images

                //LIST OF TEST SERVERS. Leave empty if you're doing a standalone installation. See documentation for details
                var SPEEDTEST_SERVERS = [
                        /*{     //this server doesn't actually exist, remove it
                                name:"Example Server 1", //user friendly name for the server
                                server:"//test1.mydomain.com/", //URL to the server. // at the beginning will be replaced with http:// or https:// automatically
                                dlURL:"backend/garbage.php",  //path to download test on this server (garbage.php or replacement)
                                ulURL:"backend/empty.php",  //path to upload test on this server (empty.php or replacement)
                                pingURL:"backend/empty.php",  //path to ping/jitter test on this server (empty.php or replacement)
                                getIpURL:"backend/getIP.php"  //path to getIP on this server (getIP.php or replacement)
                        },
                        {       //this server doesn't actually exist, remove it
                                name:"Example Server 2", //user friendly name for the server
                                server:"//test2.example.com/", //URL to the server. // at the beginning will be replaced with http:// or https:// automatically
                                dlURL:"garbage.php",  //path to download test on this server (garbage.php or replacement)
                                ulURL:"empty.php",  //path to upload test on this server (empty.php or replacement)
                                pingURL:"empty.php",  //path to ping/jitter test on this server (empty.php or replacement)
                                getIpURL:"getIP.php"  //path to getIP on this server (getIP.php or replacement)
                        }*/
                        //add other servers here, comma separated
                ];

If I replace the above code with:

    var SPEEDTEST_SERVERS = "server-list.json";

Then the list loads as expected

The list loads if I set it to use the modern gui as well just fine (-e USE_NEW_DESIGN=true)

Client

any browser, don't get a drop down list of servers on classic

Steps to reproduce

• try to use a list of servers with classic layout

Expected behaviour

list of server drop down list

Additional troubleshooting

# grep SPEEDTEST_SERVERS /entrypoint.sh
    sed -i "s/var SPEEDTEST_SERVERS = \"server-list.json\";/var SPEEDTEST_SERVERS = \"$SERVER_LIST_URL_ESCAPED\";/" /var/www/html/index-modern.html
    sed -i "s/var SPEEDTEST_SERVERS = \\[/var SPEEDTEST_SERVERS = \"$SERVER_LIST_URL_ESCAPED\";\\n\\t\\t\\/\\*/" /var/www/html/index-classic.html
    sed -i "s/var SPEEDTEST_SERVERS = \"server-list.json\";/var SPEEDTEST_SERVERS = \"$SERVER_LIST_URL_ESCAPED\";/" /var/www/html/stability.html

I believe the issue has something to do with this entrypoint sed line on classic

Start by comparing the SPEEDTEST_SERVERS declarations in index-classic.html and index-modern.html, then inspect the corresponding sed replacement in entrypoint.sh. Reproduce with USE_NEW_DESIGN disabled and a server-list.json configuration. Done means the classic layout loads the configured server list and displays its server dropdown.