Add docker shell mode, and remove some config

quay-entrypoint.sh

@@ -4,7 +4,7 @@ MODE="$1"
 
 display_usage() {
     echo "This script takes one argument."
-    echo -e "\nUsage: ${0} <config|interactive|batch|both>\n"
+    echo -e "\nUsage: ${0} <shell|config|interactive|batch|both>\n"
 }
 
 if [[ "${MODE}" = "help" ]]
@@ -32,6 +32,11 @@ EOF
 venv/bin/python -m displayversion
 
 case "$MODE" in
+    "shell")
+        echo "Entering shell mode"
+        /bin/bash
+        exit 0
+        ;;
     "config")
         echo "Entering config mode, only copying config-app entrypoints"
         cp -r ${QUAYDIR}/config_app/init/service/* /etc/service