@cyanover If you upload your shiny application to that github repo then it will automatically be deployed to the public data.ohdsi.org data server. I’m not sure who within OHDSI maintains permissions to write to that GitHub repo. Maybe @Patrick_Ryan can provide a contact for you.
The decision point on whether to use a PreMerged.RData file or a database depends on the size of the dataset. There isn’t a hard limit but if the dataset is perhaps > 256MB then switching to using a database will help with the performance of the shiny app (and the shiny application server).
The data.ohdsi.org shiny server uses a postgresql database so I’d recommend that you test the shiny application with a local postgresql database prior to deploying it on the OHDSI shiny server.
If you are approved to upload your shiny app to the ShinyDeploy server then send me a direct message with your contact information and I can setup the OHDSI shiny server database permissions and connection details if database access is needed.