directory-to-s3 | CLI to simply upload a directory to Amazon S3 | Cloud Storage library

I am attempting to get nginx to redirect/rewrite requests to a specific subdirectory so that they are served by an S3-compatible bucket instead of the server. Here is my current server block:

{snip} (See infra.)

Despite fiddling with this for some time now, I've only been able to get it to return 404s.

https://omnifora.com/t/redirect-rewrite-in-nginx-requests-to-subdirectory-to-s3-compatible-bucket/402

1. rewrite

   rewrite ^/security-now/(.*) $scheme://s3.us-west-1.wasabisys.com/bits-podcasts/security-now/$1;

2. return

   return 302 $scheme://s3.us-west-1.wasabisys.com/bits-podcasts/security-now/$1;

3. proxy_pass

   proxy_set_header Host s3.us-west-1.wasabisys.com; proxy_pass $scheme://s3.us-west-1.wasabisys.com/bits-podcasts/security-now/$1;