[MM-58065] Force the packager to create the version directory before packing (#3022)

scripts/beforepack.js

@@ -0,0 +1,14 @@
+// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+var fs = require('fs');
+var path = require('path');
+
+exports.default = async function beforePack(context) {
+    // The debian packager (fpm) complains when the directory to output the package to doesn't exist
+    // So we have to manually create it first
+    var dir = path.join(context.outDir, context.packager.appInfo.version)
+    if (!fs.existsSync(dir)){
+        fs.mkdirSync(dir);
+    }
+};