Docker - How to serve local file automatically

[oers]

Is there a way / configuration that allows me to specify a file that is automatically displayed when I use docker?

Specifically I want to provide a techradar under https://techradar.mycompany and user should just open the url and get the radar.

I have setup a apache2 proxy with proxy pass rule. And I really struggle with a way to serve the CSV File directly. Any hints are very welcome.

[oers]

This is my current approach with apache 2 but this will show the location of the techradar.csv in the browser header.
Still not the best version.

<IfModule mod_ssl.c>
        <VirtualHost *:443>
                ServerName techradar.corp

                SSLEngine on
                SSLProxyEngine on
                SSLCertificateFile      /etc/ssl/certs/techradar.crt
                SSLCertificateKeyFile /etc/ssl/private/techradar.key

                ErrorLog ${APACHE_LOG_DIR}/error.log
                CustomLog ${APACHE_LOG_DIR}/access.log combined
                ProxyPass / "http://localhost:8080/"
                ProxyPassReverse / "http://localhost:8080/"

                RewriteEngine on
                RewriteCond %{REQUEST_URI} ^/$
                RewriteCond %{QUERY_STRING} ^$
                RewriteRule / "https://techradar.corp/?documentId=https://techradar.corp/files/TechRadar.csv" [L]
       </VirtualHost>
</IfModule>
<VirtualHost *:80>
        ServerName techradar.de.ebpgroup.corp
        Redirect permanent / https://techradar.corp/
</VirtualHost>