ngnix ssl for node.js application

nginx.conf

upstream nodejs {  
    server 127.0.0.1:3000;  
}

server {  
    listen 443;  
    ssl  on;  
    server_name localhost;  
    ssl_certificate       /etc/nginx/certs/server.crt;  
    ssl_certificate_key   /etc/nginx/certs/server.key;  
    ssl_client_certificate /etc/nginx/certs/ca.crt;  
    ssl_verify_client  optional; # on  
    
    add_header Strict-Transport-Security max-age=500;  
   
    location / {  
        proxy_pass http://nodejs;  
        proxy_redirect off;  
        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-Proto https;  
    }  
} 

test.sh

curl -v -s -k --key client.key --cert client.crt https://example.com 
wget --certificate=client.crt --private-key=client.key --no-check-certificate https://example.com -qO-