ProxyVia Block
SSLProxyVerify none 
SSLProxyCheckPeerCN off
SSLProxyCheckPeerName off
SSLProxyCheckPeerExpire off

<Location "/notes">
ProxyPass https://localhost:3001
RequestHeader set X-Forwarded-Host 'datenzoo.de'
Header edit Location ^https(\:\/\/localhost/.*)$ https://datenzoo.de/notes/$1
Header edit Location ^https(\:\/\/localhost)$ https://datenzoo.de/notes/
</Location>

##</code><code>##

# If we are behind a reverse proxy, prepend our path
if ( my $path = $ENV{MOJO_REVERSE_PROXY} ) {
    my $path_uri = Mojo::URL->new($path);
    my @path_parts = grep /\S/, split m{/}, $path_uri->path;
    app->hook( before_dispatch => sub( $c ) {
        my $url = $c->req->url;
        warn "URL  is     <$url>";
        my $base = $url->base;
        unshift @{ $base->path }, @path_parts;
        $base->path->trailing_slash(1);
        $url->path->leading_slash(0);
        #$url->scheme($path_uri->protocol);
        $base->scheme($path_uri->protocol);

        if( my $f = $c->req->headers->header('X-Forwarded-Host')
            and not $path_uri->host ) {
            # We could guess the host here if it wasn't set in MOJO_REVERSE_PROXY
            # This requires that the outside-facing server resets
            # X-Forwarded-Host , so that header is not allowed to be user-controllable
            (my $host) = split /,/, $f;
            #$url->host( $host );
            $base->host( $host );
        } else {
            #$url->host($path_uri->host);
            $base->host($path_uri->host);
        }

        warn "Base is     <$base>";
        warn "URL  is now <$url>";
        $url->base( $base );
    });
}