在docker中找不到startup.sh

Question

您好我想运行此命令：

function addJohn () {
for (let iterator in MyArray) { // You can also use for... of, but it will break in Node.
     if (MyArray[iterator].name == "John") {return}; //You can also replace the string with a variable name to check that all objects do not have the variable in them.
     else continue;
}
// you can now put in your new object here.
}

首先，

startup.sh存在于docker目录中。为什么说找不到命令？