remove docker-in-docker - use volumes

docker-entrypoint

@@ -156,8 +156,12 @@ function build_crontab() {
 # Used to pass json to functions - total hack, I know
 TMP_JSON=
 
-if [ "$1" = "crond" ] && [ -f ${CONFIG} ]; then
-    build_crontab
+if [ "$1" = "crond" ]; then
+    if [ -f ${CONFIG} ]; then
+        build_crontab
+    else
+        echo "Unable to find ${HOME_DIR}/config.json"
+    fi
 fi
 
 echo "$@"