You have to use the pages API - Working with Pages Programmatically
and export all data to a XML ( or using another format). Then read the data from the XML and create your pages.
Since Sitefinity 3.7 SP3 we support multiple providers for CmsManager, so you can create the page in one provider and then move the page to the another provider which you will use on the production server. In this case you do not need to create XML file to persist the data. Generally you should better use database replication tool like RedGate.
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