execute command

scripts/combine.lua

@@ -36,6 +36,7 @@ end
 for i = 1, len do
     ngx.log(ngx.INFO, "COMBINE FILE -> ", data[i])
     local cmd = convert .. " -resize 1280x " .. data[i] .. " " .. file_dir .. "/" .. data[i] .. ".png"
+    io.popen(cmd)
     ngx.log(ngx.INFO, 'CMD RESIZE -> ', cmd)
     origin[i] = file_dir .. "/" .. data[i] .. ".png "
 end
@@ -43,5 +44,4 @@ end
 local cmd = convert .. " -append " .. table.concat(origin, " ") .. " " .. combined
 ngx.log(ngx.INFO, 'CMD APPEND -> ', cmd)
 io.popen(cmd)
-
 ngx.say(combined_uuid)