Node.js/Express: Add Expires header to /images and /stylesheets directories

server.js

# set client body size to 20M #
client_max_body_size 20M;


server Block :

location / {
        proxy_pass http://167.99.154.190:8080;
        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;

        proxy_set_header  X-Real-IP  $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }