exist: Lock down or fix peterstadler image

[thvitt]

Peter Stadler’s image causes trouble with the rewriter:

Failed to initialize request dispatcher to forward request to /exist/faust-dev/meta
at org.exist.http.urlrewrite.Forward.doRewrite(Forward.java:47)

from this dispatch:

  <dispatch>
        <forward url="{concat($exist:controller, '/meta.xql')}">            
         <set-attribute name="xquery.report-errors" value="yes"/>
         <set-attribute name="xmlpath" value="{$xmlpath}"/>
        </forward>
        <view>
            <forward servlet="XSLTServlet">
                <set-attribute name="xslt.stylesheet" value="{concat($exist:root, $exist:controller, '/xslt/search-light.xsl')}"/>
            </forward>
        </view>
    </dispatch>

Either we need to find and fix this issue, or we use the original exist image, but need to set a password and adjust the config to production needs there.