Update sebi_machine_launcher.sh

sebi_machine_launcher.sh

@@ -5,6 +5,10 @@
 # the interrupt signal. This is really annoying over SSH when I have
 # a 1-second lag anyway.
 trap "echo 'Received interrupt. Exiting.'; exit 0" SIGINT
+
+# Also loads the venv if it is present.
+[ -d .venv/bin ] && source ./venv/bin/activate && echo "Entered venv" || echo "No venv detected."
+
 until python -m src; do 
     # Added colouring to ensure the date of shutdown and the exit code stands
     # out from the other clutter in the traceback that might have been output.