Example nginx configuration for proxying an S3 bucket through Nginx with cache and cache lock

nginx.conf

server {
  listen 443 ssl;
  server_name files.example.com;
  root /var/www/html;

  keepalive_timeout 30;

  location = / {
    index index.html;
  }

  location / {
    try_files $uri @s3;
  }

  set $s3_hostname "YOUR_S3_HOSTNAME";
  set $s3_backend 'https://$s3_hostname';
  set $s3_bucket "YOUR_BUCKET_NAME";
  
  location @s3 {
    limit_except GET {
      deny all;
    }

    resolver 8.8.8.8;
    proxy_set_header Host $s3_hostname;
    proxy_set_header Connection '';
    proxy_set_header Authorization '';
    proxy_hide_header Set-Cookie;
    proxy_hide_header 'Access-Control-Allow-Origin';
    proxy_hide_header 'Access-Control-Allow-Methods';
    proxy_hide_header 'Access-Control-Allow-Headers';
    proxy_hide_header x-amz-id-2;
    proxy_hide_header x-amz-request-id;
    proxy_hide_header x-amz-meta-server-side-encryption;
    proxy_hide_header x-amz-server-side-encryption;
    proxy_hide_header x-amz-bucket-region;
    proxy_hide_header x-amzn-requestid;
    proxy_ignore_headers Set-Cookie;
    proxy_pass $s3_backend/$s3_bucket$uri;
    proxy_intercept_errors off;

    proxy_cache CACHE;
    proxy_cache_valid 200 48h;
    proxy_cache_valid 403 15m;
    proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;
    proxy_cache_lock on;

    expires 1y;
    add_header Cache-Control public;
    add_header 'Access-Control-Allow-Origin'  '*';
    add_header 'Access-Control-Allow-Methods' 'GET';
    add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
    add_header X-Cache-Status $upstream_cache_status;
  }

  # ...
}

Okay got it now ! Thanks for the clear answer !