Instructions
Go to the ̶0;Saves̶1; folder in the main Minecraft folder and copy the Save file of the survival map you want to make available on the server.
Go to the ̶0;World̶1; subfolder in the Server folder and paste the save file.
Open the "server.properties̶1; file in the World folder and enter the name of the saved game on the "level-name=" line. Open the "File" option on the menu bar and click "Save."
Launch your server to make the map available to other players.