fixed typo

sitegen/docker.https.include

@@ -2,5 +2,5 @@ ServerName %%HOST%%
 ServerAlias %%HOST%%
 ProxyPreserveHost On
 ProxyRequests off
-ProxyPass / https://127.0.0.1:8080/
+ProxyPass / http://127.0.0.1:8080/
 ProxyPassReverse / http://127.0.0.1:8080/