Re-running ./install.sh after deleting blank_program.st breaks webserver

[Chrismettal]

Description

It seems that ./install.sh always enforces the blank project to be started, but it doesn't ensure that this project is actually still present. After deleting the blank project and running ./install.sh again will result in the webserver not starting up anymore.

Restoring openplc.db with git checkout HEAD -- webserver/openplc.db will make the system run again, though this will reset the user's settings, which is a pain when you have to enter slave device information again.

Steps to reproduce

Have a working OpenPLC install running a sample project:

Delete the unused Blank project:

Re-run ./install.sh (for example after git pull to update your runtime)

Attempt to start runtime (after rebooting):