diff --git a/packages/docusaurus-theme-classic/src/theme/Footer/index.js b/packages/docusaurus-theme-classic/src/theme/Footer/index.js
index 1652a3a91157..ea04c719ea96 100644
--- a/packages/docusaurus-theme-classic/src/theme/Footer/index.js
+++ b/packages/docusaurus-theme-classic/src/theme/Footer/index.js
@@ -20,6 +20,10 @@ function Footer() {
     themeConfig: {footer},
   } = siteConfig;
 
+  if (!footer) {
+    return null;
+  }
+
   const {copyright, links = [], logo} = footer;
 
   return (
@@ -30,15 +34,17 @@ function Footer() {
       <div className="container">
         {links && links.length > 0 && (
           <div className="row footer__links">
-            {links.map(linkItem => (
-              <div className="col">
+            {links.map((linkItem, i) => (
+              <div key={`linkItem-${i}`} className="col">
                 {linkItem.title != null ? (
                   <h4 className="footer__title">{linkItem.title}</h4>
                 ) : null}
-                {linkItem.items != null && linkItem.items.length > 0 ? (
+                {linkItem.items != null &&
+                Array.isArray(linkItem.items) &&
+                linkItem.items.length > 0 ? (
                   <ul className="footer__items">
                     {linkItem.items.map(item => (
-                      <li className="footer__item">
+                      <li key={item.href || item.to} className="footer__item">
                         <Link
                           className="footer__link-item"
                           {...item}
diff --git a/packages/docusaurus/src/server/load/config.js b/packages/docusaurus/src/server/load/config.js
index fed378f1f579..bbbb79dc362b 100644
--- a/packages/docusaurus/src/server/load/config.js
+++ b/packages/docusaurus/src/server/load/config.js
@@ -7,6 +7,7 @@
 
 const fs = require('fs-extra');
 const _ = require('lodash');
+const importFresh = require('import-fresh');
 const path = require('path');
 const {CONFIG_FILE_NAME} = require('../../constants');
 
@@ -37,14 +38,11 @@ function formatFields(fields) {
   return fields.map(field => `'${field}'`).join(', ');
 }
 
-function loadConfig(siteDir, deleteCache = true) {
+function loadConfig(siteDir) {
   const configPath = path.resolve(siteDir, CONFIG_FILE_NAME);
-  if (deleteCache) {
-    delete require.cache[configPath];
-  }
   let loadedConfig = {};
   if (fs.existsSync(configPath)) {
-    loadedConfig = require(configPath); // eslint-disable-line
+    loadedConfig = importFresh(configPath);
   }
 
   const missingFields = REQUIRED_FIELDS.filter(
diff --git a/website/docusaurus.config.js b/website/docusaurus.config.js
index b3e1ed67fa77..0a1b6d23639d 100644
--- a/website/docusaurus.config.js
+++ b/website/docusaurus.config.js
@@ -52,6 +52,10 @@ module.exports = {
               label: 'Feedback',
               to: 'feedback',
             },
+            {
+              label: 'Discord',
+              href: 'https://discordapp.com/invite/docusaurus',
+            },
           ],
         },
         {