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/core/mergeConfig.js

@@ -0,0 +1,106 @@
+'use strict';
+
+import utils from '../utils.js';
+import AxiosHeaders from "./AxiosHeaders.js";
+
+const headersToObject = (thing) => thing instanceof AxiosHeaders ? { ...thing } : thing;
+
+/**
+ * Config-specific merge-function which creates a new config-object
+ * by merging two configuration objects together.
+ *
+ * @param {Object} config1
+ * @param {Object} config2
+ *
+ * @returns {Object} New object resulting from merging config2 to config1
+ */
+export default function mergeConfig(config1, config2) {
+  // eslint-disable-next-line no-param-reassign
+  config2 = config2 || {};
+  const config = {};
+
+  function getMergedValue(target, source, prop, caseless) {
+    if (utils.isPlainObject(target) && utils.isPlainObject(source)) {
+      return utils.merge.call({caseless}, target, source);
+    } else if (utils.isPlainObject(source)) {
+      return utils.merge({}, source);
+    } else if (utils.isArray(source)) {
+      return source.slice();
+    }
+    return source;
+  }
+
+  // eslint-disable-next-line consistent-return
+  function mergeDeepProperties(a, b, prop , caseless) {
+    if (!utils.isUndefined(b)) {
+      return getMergedValue(a, b, prop , caseless);
+    } else if (!utils.isUndefined(a)) {
+      return getMergedValue(undefined, a, prop , caseless);
+    }
+  }
+
+  // eslint-disable-next-line consistent-return
+  function valueFromConfig2(a, b) {
+    if (!utils.isUndefined(b)) {
+      return getMergedValue(undefined, b);
+    }
+  }
+
+  // eslint-disable-next-line consistent-return
+  function defaultToConfig2(a, b) {
+    if (!utils.isUndefined(b)) {
+      return getMergedValue(undefined, b);
+    } else if (!utils.isUndefined(a)) {
+      return getMergedValue(undefined, a);
+    }
+  }
+
+  // eslint-disable-next-line consistent-return
+  function mergeDirectKeys(a, b, prop) {
+    if (prop in config2) {
+      return getMergedValue(a, b);
+    } else if (prop in config1) {
+      return getMergedValue(undefined, a);
+    }
+  }
+
+  const mergeMap = {
+    url: valueFromConfig2,
+    method: valueFromConfig2,
+    data: valueFromConfig2,
+    baseURL: defaultToConfig2,
+    transformRequest: defaultToConfig2,
+    transformResponse: defaultToConfig2,
+    paramsSerializer: defaultToConfig2,
+    timeout: defaultToConfig2,
+    timeoutMessage: defaultToConfig2,
+    withCredentials: defaultToConfig2,
+    withXSRFToken: defaultToConfig2,
+    adapter: defaultToConfig2,
+    responseType: defaultToConfig2,
+    xsrfCookieName: defaultToConfig2,
+    xsrfHeaderName: defaultToConfig2,
+    onUploadProgress: defaultToConfig2,
+    onDownloadProgress: defaultToConfig2,
+    decompress: defaultToConfig2,
+    maxContentLength: defaultToConfig2,
+    maxBodyLength: defaultToConfig2,
+    beforeRedirect: defaultToConfig2,
+    transport: defaultToConfig2,
+    httpAgent: defaultToConfig2,
+    httpsAgent: defaultToConfig2,
+    cancelToken: defaultToConfig2,
+    socketPath: defaultToConfig2,
+    responseEncoding: defaultToConfig2,
+    validateStatus: mergeDirectKeys,
+    headers: (a, b , prop) => mergeDeepProperties(headersToObject(a), headersToObject(b),prop, true)
+  };
+
+  utils.forEach(Object.keys(Object.assign({}, config1, config2)), function computeConfigValue(prop) {
+    const merge = mergeMap[prop] || mergeDeepProperties;
+    const configValue = merge(config1[prop], config2[prop], prop);
+    (utils.isUndefined(configValue) && merge !== mergeDirectKeys) || (config[prop] = configValue);
+  });
+
+  return config;
+}