Reverse proxy nginx port 443 to Node App with SSL - node.js

Question

I have setup my express & node app to use my letsencrypt ssl certs as so
var options = {
key: fs.readFileSync('/etc/letsencrypt/live/example.com/privkey.pem'),
cert: fs.readFileSync('/etc/letsencrypt/live/example.com/cert.pem')
};
// Create an HTTP service.
http.createServer(app).listen(3060);
// Create an HTTPS service identical to the HTTP service.
https.createServer(options, app).listen(3061);
I can reach my API at domain.com (hitting port 80 in nginx)
But I can't reach it if I hit https://example.com (port 443)
However I can reach it if I open up port 3061 and request https://example.com:3061 and it works correctly with SSL
My question is, how do I setup nginx to correctly forward requests on port 443 to my server on port 3061 for SSL.
Do I need to include the cert information as suggested elsewhere, if my app is dealing with it?
My nginx config is like this:
server {
listen 80;
server_name example.com;
location / {
proxy_pass http://localhost:3060;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}
}
server {
listen 443 ssl;
server_name example.com;
location / {
proxy_pass https://localhost:3061;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}
}
Thanks