添加docker安装node

docker_init.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # replace default api path to new one
 if [ "${CRAWLAB_API_ADDRESS}" = "" ]; 
@@ -22,5 +22,12 @@ fi
 # start nginx
 service nginx start
 
+# install languages: Node.js
+if [ "${CRAWLAB_SERVER_LANG_NODE}" = "Y" ];
+then
+	echo "installing node.js"
+	/bin/sh /app/backend/scripts/install-nodejs.sh
+fi
+
 # start backend
 crawlab