diff --git a/codepot/docker/readme.txt b/codepot/docker/README.md
similarity index 60%
rename from codepot/docker/readme.txt
rename to codepot/docker/README.md
index 2f3dd9f7..fd97385a 100644
--- a/codepot/docker/readme.txt
+++ b/codepot/docker/README.md
@@ -1,3 +1,6 @@
+If you require the root privilege to build a docker image, specify sudo in DOCKER.
+	make rocky8 DOCKER="sudo docker"
+
 Run the service
 	docker run -dit --restart unless-stopped --name codepot -p 7000:80 codepot:ubnt20.04
 
diff --git a/codepot/docker/httpd-fg.sh b/codepot/docker/httpd-fg.sh
index 3c20ed57..ac989508 100755
--- a/codepot/docker/httpd-fg.sh
+++ b/codepot/docker/httpd-fg.sh
@@ -104,5 +104,9 @@ grep -F -q 'env[CODEPOT_CONFIG_FILE]' /etc/php-fpm.d/www.conf || {
 echo "Configuring to listen on the port [$SERVICE_PORT]"
 sed -r -i "s|^Listen[[:space:]]+.*|Listen ${SERVICE_PORT}|g" /etc/httpd/conf/httpd.conf
 
+## Enable DAV to work with Apache running HTTP through SSL hardware (problem description) 
+## by replacing https: with http: in the Destination header:
+##RequestHeader edit Destination ^https: http: early
+
 php-fpm
 exec httpd -DFOREGROUND