Caddyfile

0.0.0.0 {
    redir /app/static /app/static/

    proxy / kibana:5601 {
        except /app/static
        except /index.html
    }
    log stdout
    errors stdout

    root /srv
}

0.0.0.0/app/static/ {
    header / {
        X-Requested-URI {uri}
        X-Requested-Path {path}
        X-Requested-Dir {dir}
        X-Requested-File {file}
    }

    reauth {
        path /
        upstream url=http://kibana:5601/app/kibana,cookies=true,follow=true,match=login
        failure redirect target=/login?next={uri}
    }

    root /srv
    log stdout
    errors stdout
}