feat: ✨ Created a mini nodeJS server with NewMan for testing without PostMan GUI.

This will mimic a run in a CD/CI environment or docker container.

node_modules/postman-collection/lib/collection/header-list.js

@@ -0,0 +1,61 @@
+var _ = require('../util').lodash,
+    PropertyList = require('./property-list').PropertyList,
+    Header = require('./header').Header,
+
+    PROP_NAME = '_postman_propertyName',
+
+    HeaderList;
+
+_.inherit((
+
+    /**
+    * Contains a list of header elements
+    *
+    * @constructor
+    * @param {Object} parent -
+    * @param {Header[]} headers -
+    * @extends {PropertyList}
+    */
+    HeaderList = function (parent, headers) {
+        // this constructor is intended to inherit and as such the super constructor is required to be executed
+        HeaderList.super_.call(this, Header, parent, headers);
+    }), PropertyList);
+
+_.assign(HeaderList.prototype, /** @lends HeaderList.prototype */ {
+    /**
+     * Gets size of a list of headers excluding standard header prefix.
+     *
+     * @returns {Number}
+     */
+    contentSize () {
+        if (!this.count()) { return 0; }
+
+        return Header.unparse(this).length;
+    }
+});
+
+_.assign(HeaderList, /** @lends HeaderList */ {
+    /**
+     * Defines the name of this property for internal use.
+     *
+     * @private
+     * @readOnly
+     * @type {String}
+     */
+    _postman_propertyName: 'HeaderList',
+
+    /**
+     * Checks if the given object is a HeaderList
+     *
+     * @param {*} obj -
+     * @returns {Boolean}
+     */
+    isHeaderList: function (obj) {
+        return Boolean(obj) && ((obj instanceof HeaderList) ||
+          _.inSuperChain(obj.constructor, PROP_NAME, HeaderList._postman_propertyName));
+    }
+});
+
+module.exports = {
+    HeaderList
+};