fix: /tmp/element-web-config may already exist preventing the container from booting up (#29372)

* fix: /tmp/element-web-config may already exist preventing the container from booting up

* Update docker/docker-entrypoint.d/18-load-element-modules.sh

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

docker/docker-entrypoint.d/18-load-element-modules.sh

@@ -11,7 +11,7 @@ entrypoint_log() {
 }
 
 # Copy these config files as a base
-mkdir /tmp/element-web-config
+mkdir -p /tmp/element-web-config
 cp /app/config*.json /tmp/element-web-config/
 
 # If there are modules to be loaded