Major overhaul

- Docker buildx support in CI
- Cypress API Testing in CI
- Restructured folder layout (insert clean face meme)
- Added Swagger documentation and validate API against that (to be completed)
- Use common base image for all supported archs, which includes updated nginx with ipv6 support
- Updated certbot and changes required for it
- Large amount of Hosts names will wrap in UI
- Updated packages for frontend
- Version bump 2.1.0

frontend/js/app/ui/footer/main.ejs

@@ -0,0 +1,16 @@
+<div class="row align-items-center flex-row-reverse">
+    <div class="col-auto ml-auto">
+        <div class="row align-items-center">
+            <div class="col-auto">
+                <ul class="list-inline list-inline-dots mb-0">
+                    <li class="list-inline-item"><a href="https://github.com/jc21/nginx-proxy-manager?utm_source=nginx-proxy-manager"><%- i18n('footer', 'fork-me') %></a></li>
+                </ul>
+            </div>
+        </div>
+    </div>
+    <div class="col-12 col-lg-auto mt-3 mt-lg-0 text-center">
+        <%- i18n('main', 'version', {version: getVersion()}) %>
+        <%= i18n('footer', 'copy', {url: 'https://jc21.com?utm_source=nginx-proxy-manager'}) %>
+        <%= i18n('footer', 'theme', {url: 'https://tabler.github.io/?utm_source=nginx-proxy-manager'}) %>
+    </div>
+</div>

frontend/js/app/ui/footer/main.js

@@ -0,0 +1,14 @@
+const Mn       = require('backbone.marionette');
+const template = require('./main.ejs');
+const Cache    = require('../../cache');
+
+module.exports = Mn.View.extend({
+    className: 'container',
+    template:  template,
+
+    templateContext: {
+        getVersion: function () {
+            return Cache.version || '0.0.0';
+        }
+    }
+});