Add sample nginx site configuration

Since we have to set the CORS header for data.json, we make sure that
there's some form of documentation in this repo

nginx-site.conf

@@ -0,0 +1,11 @@
+# assuming the dist repo lives at /srv/http/lavender.software
+
+location / {
+  alias /srv/http/lavender.software/;
+}
+
+error_page 404 /404.html
+
+location = /webring/data.json {
+  add_header Access-Control-Allow-Origin *;
+}