优化安装界面

backend/scripts/install-java.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# lock global
+touch /tmp/install.lock
+
 # lock
 touch /tmp/install-java.lock
 
@@ -11,3 +14,6 @@ ln -s /usr/bin/java /usr/local/bin/java
 
 # unlock
 rm /tmp/install-java.lock
+
+# unlock global
+rm /tmp/install.lock

backend/scripts/install-nodejs.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# lock global
+touch /tmp/install.lock
+
 # lock
 touch /tmp/install-nodejs.lock
 
@@ -39,3 +42,6 @@ npm install puppeteer-chromium-resolver crawlab-sdk -g --unsafe-perm=true --regi
 
 # unlock
 rm /tmp/install-nodejs.lock
+
+# unlock global
+rm /tmp/install.lock

backend/scripts/install.sh

@@ -1,4 +1,4 @@
-#/bin/bash
+#!/bin/bash
 
 # install node.js
 if [ "${CRAWLAB_SERVER_LANG_NODE}" = "Y" ];