Add persistency to continue jobs after restart of docker container

[D4Ci0]

Hi,

right now there is a problem after restarting/pausing the docker container.

Since "last_item" (and perhaps also "url") is not stored in an external database/file, the script just stops working after a restart of the docker container.

Therefore, there would need to be a .db-file, in which the last id's and given url's are stored to continue the job after a restart, if these are empty and initialization was done beforehand.