configuring subdirectory in a wordpress installation for proxy pass to docker application

Question

I have a wordpress installation using Nginx as the web server, now there is a need of adding moodle as the LMS to the same site, as a subdirectory, for example; www.mysite.com is where the wordpress site works then moodle would be www.mysite.com/learn.

This moodle runs in the same machine in a docker container which uses the bitnami moodle image; port 8081 is mapped to port 80 of the docker container i.e.

docker run -d -p 8081:80 -p 4443:443 --name moodle

I added a location block before wordpress configuration to the nginx config

location /learn {
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Host $server_name;
    proxy_pass http://0.0.0.0:8081;
}

the php configuration for wordpress is as follows

# Pass the PHP scripts to FastCGI server (locally with unix: param to avoid network overhead)
location ~ \.php$ {
    # Prevent Zero-day exploit
    try_files $uri =404;

    fastcgi_split_path_info ^(.+\.php)(/.+)$;
    #NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini

    fastcgi_pass    unix:/run/php/php7.1-fpm.sock;
    fastcgi_index   index.php;
    fastcgi_param   SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_param   APP_ENV  production;
    include         fastcgi_params;
}

However this still gives a 404 response when I access www.amysite.com/learn

I checked the docker proxy is running bound to all IP addresses

/usr/bin/docker-proxy -proto tcp -host-ip 0.0.0.0 -host-port 8081 -container-ip 172.19.0.3 -container-port 80

also a wget to localhost:8081 gives the moodle installation home page so I'm led to belive it is definitely a problem with my location block; or it is the Zero Day exploit config try_files $uri =404; causing the issue, even if so, I still can't remove that line.

Update

This configuration worked

location ~ ^/apply/(.*)$ {
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Host $server_name;
    proxy_pass http://0.0.0.0:8081/$1;
}

I can reach Moodle home page but all further URLs break because Moodle is not aware of generating links with the /learn context root; think I'll have to reconfigure Moodle to generate /learn context URLS