build: add node-acme-client copy

packages/core/acme-client/src/axios.js

@@ -0,0 +1,40 @@
+/**
+ * Axios instance
+ */
+
+const axios = require('axios');
+const adapter = require('axios/lib/adapters/http');
+const pkg = require('./../package.json');
+
+
+/**
+ * Instance
+ */
+
+const instance = axios.create();
+
+/* Default User-Agent */
+instance.defaults.headers.common['User-Agent'] = `node-${pkg.name}/${pkg.version}`;
+
+/* Default ACME settings */
+instance.defaults.acmeSettings = {
+    httpChallengePort: 80,
+    bypassCustomDnsResolver: false
+};
+
+
+/**
+ * Explicitly set Node as default HTTP adapter
+ *
+ * https://github.com/axios/axios/issues/1180
+ * https://stackoverflow.com/questions/42677387
+ */
+
+instance.defaults.adapter = adapter;
+
+
+/**
+ * Export instance
+ */
+
+module.exports = instance;