I am trying to install Confluence but the demo-site.zip file is missing

The demo-site.zip is normally located in the WEB-INF/classes/com/atlassian/confluence/setup directory.

There are some cases where the extraction utility used to extract the Confluence installation file will recursively extract the contents of all zip files contained within the installation file. If the demo-site.zip file has been extracted, you will see an entities.xml file in this directory instead.