chore: add project dependencies and configuration files

Initial setup of project dependencies including axios, express, dotenv, and other supporting packages. Added configuration files and documentation for project setup and usage.

node_modules/axios/lib/helpers/buildURL.js

@@ -0,0 +1,69 @@
+'use strict';
+
+import utils from '../utils.js';
+import AxiosURLSearchParams from '../helpers/AxiosURLSearchParams.js';
+
+/**
+ * It replaces all instances of the characters `:`, `$`, `,`, `+`, `[`, and `]` with their
+ * URI encoded counterparts
+ *
+ * @param {string} val The value to be encoded.
+ *
+ * @returns {string} The encoded value.
+ */
+function encode(val) {
+  return encodeURIComponent(val).
+    replace(/%3A/gi, ':').
+    replace(/%24/g, '$').
+    replace(/%2C/gi, ',').
+    replace(/%20/g, '+').
+    replace(/%5B/gi, '[').
+    replace(/%5D/gi, ']');
+}
+
+/**
+ * Build a URL by appending params to the end
+ *
+ * @param {string} url The base of the url (e.g., http://www.google.com)
+ * @param {object} [params] The params to be appended
+ * @param {?(object|Function)} options
+ *
+ * @returns {string} The formatted url
+ */
+export default function buildURL(url, params, options) {
+  /*eslint no-param-reassign:0*/
+  if (!params) {
+    return url;
+  }
+  
+  const _encode = options && options.encode || encode;
+
+  if (utils.isFunction(options)) {
+    options = {
+      serialize: options
+    };
+  } 
+
+  const serializeFn = options && options.serialize;
+
+  let serializedParams;
+
+  if (serializeFn) {
+    serializedParams = serializeFn(params, options);
+  } else {
+    serializedParams = utils.isURLSearchParams(params) ?
+      params.toString() :
+      new AxiosURLSearchParams(params, options).toString(_encode);
+  }
+
+  if (serializedParams) {
+    const hashmarkIndex = url.indexOf("#");
+
+    if (hashmarkIndex !== -1) {
+      url = url.slice(0, hashmarkIndex);
+    }
+    url += (url.indexOf('?') === -1 ? '?' : '&') + serializedParams;
+  }
+
+  return url;
+}