improved error handling when starting server
improved error handling when starting server

MajorMJR/factorio-server-manager,sean-callahan/factorio-server-manager,mroote/factorio-server-manager,MajorMJR/factorio-server-manager,mroote/factorio-server-manager,sean-callahan/factorio-server-manager,sean-callahan/factorio-server-manager,MajorMJR/factorio-server-manager,MajorMJR/factorio-server-manager,mroote/factorio-server-manager,mroote/factorio-server-manager,sean-callahan/factorio-server-manager