Add Caddy Server Support Alongside Nginx (#600)

* added enum

* add config for caddy

* add svg icon

* add caddy service class

* wip

* install caddy

* create base Caddyfile with common snippets

* Create a systemd service to run Caddy in the background.

* create uninstall file

* wip

* create path

* create vhost

* get vhost

* delete site

* add php version change file

* add custom ssl

* create redirect file

* add vhost for caddy site & load balancer

* update svg

* fix caddy icon

* fix style

* add systemctl reload method

* Reload systemd after modifying the Caddy service file.

* add caddy

* added tests

* format with pint

* prevent multiple web server installations

* added error log & access log

(cherry picked from commit 2318e1b1df)

app/SSH/Services/Webserver/AbstractWebserver.php

@@ -3,5 +3,37 @@
 namespace App\SSH\Services\Webserver;
 
 use App\SSH\Services\AbstractService;
+use Closure;
 
-abstract class AbstractWebserver extends AbstractService implements Webserver {}
+abstract class AbstractWebserver extends AbstractService implements Webserver
+{
+    public function creationRules(array $input): array
+    {
+        return [
+            'type' => [
+                'required',
+                function (string $attribute, mixed $value, Closure $fail): void {
+                    $webserverExists = $this->service->server->webserver();
+                    if ($webserverExists) {
+                        $fail('You already have a webserver service on the server.');
+                    }
+                },
+            ],
+        ];
+    }
+
+    public function deletionRules(): array
+    {
+        return [
+            'service' => [
+                function (string $attribute, mixed $value, Closure $fail): void {
+                    $hasSite = $this->service->server->sites()
+                        ->exists();
+                    if ($hasSite) {
+                        $fail('Cannot uninstall webserver while you have websites using it.');
+                    }
+                },
+            ],
+        ];
+    }
+}