feat(nixos/www): Add configuration for tvl.fyi homepage

... and enable it on whitby

Change-Id: Ife45f15227f9d95823ebd3b97d2a17175b84eaff
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1064
Tested-by: BuildkiteCI
Reviewed-by: lukegb <lukegb@tvl.fyi>

ops/nixos/www/tvl.fyi.nix

@@ -0,0 +1,30 @@
+{ config, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."tvl.fyi" = {
+      serverName = "tvl.fyi";
+      root = config.depot.web.tvl;
+      enableACME = true;
+      forceSSL = true;
+
+      extraConfig = ''
+        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+
+        rewrite ^/builds/?$ https://buildkite.com/tvl/depot/ last;
+
+        rewrite ^/monorepo-doc/?$ https://docs.google.com/document/d/1nnyByXcH0F6GOmEezNOUa2RFelpeRpDToBLYD_CtjWE/edit?usp=sharing last;
+
+        rewrite ^/irc/?$ ircs://chat.freenode.net:6697/##tvl last;
+
+        location ~* \.(webp|woff2)$ {
+          add_header Cache-Control "public, max-age=31536000";
+        }
+      '';
+    };
+  };
+}