Best nginx configuration for improved security(and performance). Complete blog post here http://tautt.com/best-nginx-configuration-for-security/

nginx.conf

# for detailed explaination @see # https://gist.github.com/plentz/6737338
server_tokens off;
add_header X-Frame-Options SAMEORIGIN;
add_header X-Content-Type-Options nosniff;
add_header X-XSS-Protection "1; mode=block";
add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://ssl.google-analytics.com https://assets.zendesk.com https://connect.facebook.net; img-src 'self' https://ssl.google-analytics.com https://s-static.ak.facebook.com https://assets.zendesk.com; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com https://assets.zendesk.com; font-src 'self' https://themes.googleusercontent.com; frame-src https://assets.zendesk.com https://www.facebook.com https://s-static.ak.facebook.com https://tautt.zendesk.com; object-src 'none'";

# as we use Azure the SSL part is done by the WebApp Service
server {
    listen 80 default;

    gzip on;
    gzip_min_length 1000;
    gzip_proxied expired no-cache no-store private auth;
  
    # redirect / requests to container frontend
    location / {
        proxy_pass http://frontend;
    }
  
    # redirect /api requests to container backend
    location /api/ {
        proxy_pass http://backend/;
    }
}