shinyproxy: Problems building off rocker-org images (instead of openanalytics/r-base)

Using this application.yml file and the nginx config below I’m able to see the landing page at http://165.227.184.97/, but it can’t find the appropriate web assets (e.g., bootstrap).

server {
	listen 80 default_server;
	listen [::]:80 default_server;

	root /var/www/html;

	# Add index.php to the list if you are using PHP
	index index.html index.htm index.nginx-debian.html;

	server_name localhost;

	location / {
		
		proxy_pass                            http://127.0.0.1:8080/;
    		proxy_http_version                    1.1;
    		proxy_set_header Upgrade              $http_upgrade;
    		proxy_set_header Connection           "upgrade";
    		proxy_read_timeout                    600s;
    		proxy_redirect                        off;
    		proxy_set_header Host                 $http_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-Protocol $scheme;
	
		# First attempt to serve request as file, then
		# as directory, then fall back to displaying a 404.
		try_files $uri $uri/ =404;
	}

}

Not sure where to look to investigate (I’m not very familiar with Java/Spring), so any pointers would be much appreciated!