chore: configuration for docs-preview (#1518)

- nginx configuration for apify-docs-preview - everything pointed to
*.preview.docs.apify.com domain will be proxied to the
apify-docs-preview S3 bucket directly. It will be used for
"staging/preview" documentation

Author: seyhello

nginx.conf

@@ -441,3 +441,21 @@ server {
   # Redirect rule so that /python/docs actually leads somewhere
   rewrite ^/python/docs/?$ /python/docs/quick-start;
 }
+
+server {
+    listen 0.0.0.0:8080;
+
+    server_name ~^(?<subdomain>[^.]+)\.preview\.docs\.apify\.com$;
+
+    location ~ ^/(.*)/$ {
+        proxy_pass https://s3.amazonaws.com/apify-docs-preview/$subdomain/$1/index.html;
+    }
+
+    location ~ ^/(.*[^./])$ {
+        proxy_pass https://s3.amazonaws.com/apify-docs-preview/$subdomain/$1.html;
+    }
+
+    location / {
+        proxy_pass https://s3.amazonaws.com/apify-docs-preview/$subdomain/;
+    }
+}