feat: exit the Populate function when another one is started

+ add test for the extract_fetured_artists_from_title function

start.sh

@@ -5,21 +5,5 @@ gpath=$(poetry run which gunicorn)
 
 # $pytest # -q
 
-while getopts ':s' opt; do
-  case $opt in
-    s)
-      echo "Starting image server"
-      cd "./app"
-      "$gpath" -b 0.0.0.0:1971 -w 1 --threads=1 "imgserver:app" &
-      cd ../
-      echo "Done ✅"
-      ;;
-    \?)
-      echo "Invalid option: -$OPTARG" >&2
-      ;;
-  esac
-done
-
-
 echo "Starting swing"
-"$gpath" -b 0.0.0.0:1970 --threads=2 "manage:create_api()"
+"$gpath" -b 0.0.0.0:1970 --threads=2 "manage:create_api()"