chore(apereo-cas): fix up configuration

- X-Forwarded-Proto support so it knows it's behind TLS
- Remove extraneous logs and just log to stdout so it's caught be systemd

Change-Id: I650777bbfd24a1922f26967ffff7da06d14b6639
Reviewed-on: https://cl.tvl.fyi/c/depot/+/952
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>

ops/nixos/www/login.tvl.fyi.nix

@@ -15,6 +15,7 @@
         location / {
           proxy_pass http://localhost:8443;
           proxy_set_header X-Forwarded-For $remote_addr;
+          proxy_set_header X-Forwarded-Proto https;
           proxy_set_header Host $host;
         }
       '';