We can install mod_qos package inside our Docker container.

Then we can verify the module is installed for mod_qos inside /..../modules/ directory.

If it's installed correctly then we can add mod_qos.conf file inside /..../conf.d/mod_qos.conf file with following configuration

## QoS Settings
<IfModule mod_qos.c>
    # handles connections from up to 100000 different IPs
    #QS_ClientEntries 100000

    # will allow only 10 connections per IP
    QS_SrvMaxConnPerIP 30

    # maximum number of active TCP connections is limited to 256
    MaxClients 256
    
    # disables keep-alive when 70% of the TCP connections are occupied:
    
    QS_SrvMaxConnClose 180
    # minimum request/response speed (deny slow clients blocking the server i.e. slowloris keeping connections open without requesting anything
    QS_SrvMinDataRate 150 1200

    # and limit request header and body (carefull, that limits uploads and post requests too):
    LimitRequestFields 30
    QS_LimitRequestBody 102400
</IfModule>