https setup issue on nginx front ending apache

Question

I have Nginx on port 80 which handles abc.com, one.abc.com and two.abc.com. For abc.com and one.abc.com, it redirects to Apache on port 8080. For two.abc.com, it redirects to Apache on port 8081.

The task now is to upgrade to https. When I install certbot on nginx, still the one.abc.com redirects to http://one.abc.com

Sample nginx conf:
server {
listen 80;
servername abc.com, one.abc.com;
location / {
proxysetheader X-Real-IP $remoteaddr;
proxysetheader Host $httphost;
proxypass http://127.0.0.1:8080;
}
}

server {
    listen      80;
    server_name two.abc.com;
    location / {
        proxy_set_header   X-Real-IP $remote_addr;
        proxy_set_header   Host      $http_host;
        proxy_pass         http://127.0.0.1:8081;
    }
}