Add zero-config self hosting on Render (#612)

* v1 of backend implementation for self hosting

* Add docs

* Add upgrades controller

* Add global helpers for self hosting mode

* Add self host settings controller

* Conditionally show self hosting settings

* Environment and config updates

* Complete upgrade prompting flow

* Update config for forked repo

* Move configuration of github provider within class

* Add upgrades cron

* Update deploy button

* Update guides

* Fix render deployer

* Typo

* Enable auto upgrades

* Fix cron

* Make upgrade modes more clear and consistent

* Trigger new available version

* Fix logic for displaying upgrade prompts

* Finish implementation

* Fix regression

* Trigger new version

* Add i18n translations

* trigger new version

* reduce caching time for testing

* Decrease cache for testing

* trigger upgrade

* trigger upgrade

* Only trigger deploy once

* trigger upgrade

* If target is commit, always upgrade if any upgrade is available

* trigger upgrade

* trigger upgrade

* Test release

* Change back to maybe repo for defaults

* Fix lint errors

* Clearer naming

* Fix relative link

* Add abs path

* Relative link

* Update docs

app/views/settings/self_hosting/edit.html.erb

@@ -0,0 +1,40 @@
+<div class="space-y-4">
+  <h1 class="text-3xl font-semibold font-display">Edit Self Hosting Settings</h1>
+  <hr>
+  <%= form_with model: Setting.new, url: settings_self_hosting_path, method: :patch, local: true, html: { class: "space-y-4" } do |form| %>
+    <section class="space-y-3">
+      <h2 class="text-2xl font-semibold">Render Deploy Hook</h2>
+      <p class="text-gray-500">You must fill this in so your app can trigger upgrades when Maybe releases upgrades.  Learn more about deploy hooks and how they work in the <%= link_to "Render documentation", "https://docs.render.com/docs/deploy-hooks", target: "_blank", rel: "noopener noreferrer", class: "text-blue-500 hover:underline" %>.</p>
+      <%= form.text_field :render_deploy_hook, label: "Render Deploy Hook", placeholder: "https://api.render.com/deploy/srv-xyz...", value: Setting.render_deploy_hook %>
+    </section>
+    <section class="space-y-3">
+      <h2 class="text-2xl font-semibold">Auto Upgrades Setting</h2>
+      <p class="text-gray-500">This setting controls how often your self hosted app will update and what method it uses to do so.</p>
+      <div class="space-y-2">
+        <div class="flex items-center gap-2">
+          <%= form.check_box :upgrades_mode, { checked: Setting.upgrades_mode == "auto", unchecked_value: "manual" }, "auto", "manual" %>
+          <%= form.label :upgrades_mode, "Enable auto upgrades", class: "text-gray-900" %>
+        </div>
+        <% if Setting.upgrades_mode == "auto" %>
+          <div class="flex items-center gap-2">
+            <%= form.radio_button :upgrades_target, "release", checked: Setting.upgrades_target == "release" %>
+            <%= form.label :upgrades_target_release, class: Setting.upgrades_target == "release" ? "text-gray-900" : "text-gray-500" do %>
+              <span class="font-semibold">Latest Release (suggested)</span> - you will automatically be upgraded to the latest stable release of Maybe
+            <% end %>
+          </div>
+          <div class="flex items-center gap-2">
+            <%= form.radio_button :upgrades_target, "commit", checked: Setting.upgrades_target == "commit" %>
+            <%= form.label :upgrades_target_commit, class: Setting.upgrades_target == "commit" ? "text-gray-900" : "text-gray-500" do %>
+              <span class="font-semibold">Latest Commit</span> - you will automatically be upgraded any time the Maybe repo is updated
+            <% end %>
+          </div>
+        <% end %>
+      </div>
+    </section>
+    <div class="fixed right-5 bottom-5">
+      <button type="submit" class="flex items-center justify-center w-12 h-12 mb-2 bg-black rounded-full shrink-0 grow-0 hover:bg-gray-600">
+        <%= inline_svg_tag("icn-check.svg", class: "text-white fill-current") %>
+      </button>
+    </div>
+  <% end %>
+</div>