feat(docker): host gzip archive downloads

- added config option [mkpkglists] archivedir
    - created by mkpkglists

Signed-off-by: Kevin Morris <kevr@0cost.org>

docker/config/nginx.conf

@@ -94,7 +94,24 @@ http {
         ssl_certificate /etc/ssl/certs/web.cert.pem;
         ssl_certificate_key /etc/ssl/private/web.key.pem;
 
-        root /aurweb/web/html;
+        location ~ ^/.*\.gz$ {
+            # Override mime type to text/plain.
+            types { text/plain gz; }
+            default_type text/plain;
+
+            # Filesystem location of .gz archives.
+            root /var/lib/aurweb/archives;
+
+            # When we match this block, fix-up trying without a trailing slash.
+            try_files $uri $uri/ =404;
+
+            # Caching headers.
+            expires    max;
+            add_header Content-Encoding gzip;
+            add_header Cache-Control public;
+            add_header Last-Modified "";
+            add_header ETag "";
+        }
 
         location / {
             try_files $uri @proxy_to_app;