Error while running jasperserver behind a Nginx reverse proxy.

Hi,

i have several instances of dockerized jasperserver instances. They are running on the same server on different port.
On the same server i also has a nginx server running too. 

i have following settings on Dockerfile to host http://xx.xx.xx.xx/ instead of http://xx.xx.xx.xx/jasperserver.

Dockerfile

RUN rm -rf /usr/local/tomcat/webapps/ROOT
RUN mv /usr/local/tomcat/webapps/jasperserver /usr/local/tomcat/webapps/ROOT
RUN rm -r /usr/local/tomcat/work

web.xml

<context-param>
        <param-name>webAppRootKey</param-name>
        <param-value>ROOT.root</param-value>
</context-param>

My environments are as follows.

So when i point to http://xx.xx.xx.xx:13429/ . i can login to jasperserver with credentiuals.

My next step is to access jasperver via nginx.

This is my location block for ops env.

location /reporting-ops/ {

        proxy_set_header    Host $host;
        proxy_set_header X-Forwarded-Proto $scheme;
        rewrite ^\/reporting-ops\/(.*) /$1 break;
        proxy_redirect off;
        proxy_pass http://xx.xx.xx.xx:13429/$1;
}

when i type http://xx.xx.xx.xx/reporting-ops/ on the browser i get redirected. (Please see image)

i have done same kind of url rewriting for other appl;ications and they work fine. So i assume this must be something to 
do with jasperserver.

Thank you Very much.