install missing file command

.drone.yml

@@ -15,6 +15,10 @@ steps:
     environment:
       EXCLUDE: "(.exe|.dll|.ico|.gitkeep)"
     commands:
+      - |
+        apt-get update
+        apt-get install -y file
+
       - |
         pwsh -NonInteractive -c "& {
           Import-Module './tools/DevDependency.psm1' -ErrorAction 'Stop';