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)

resources/views/ssh/services/webserver/caddy/vhost.blade.php

@@ -0,0 +1,47 @@
+{{ $site->domain }} {{ $site->getAliasesString() }} {
+    @if ($site->activeSsl)
+    tls {{ $site->activeSsl->certificate_path }} {{ $site->activeSsl->pk_path }}
+    @endif
+    @if ($site->activeSsl && $site->force_ssl)
+    redir @http https://{host}{uri} permanent
+    @endif
+    import access_log {{ $site->domain }}
+    import compression
+    import security_headers
+    @if ($site->type()->language() === 'php')
+        root * {{ $site->getWebDirectoryPath() }}
+        @php
+            $phpSocket = "unix//var/run/php/php{$site->php_version}-fpm.sock";
+            if ($site->isIsolated()) {
+                $phpSocket = "unix//run/php/php{$site->php_version}-fpm-{$site->user}.sock";
+            }
+        @endphp
+        try_files {path} {path}/ /index.php?{query}
+        php_fastcgi {{ $phpSocket }}
+        file_server
+    @endif
+    @if ($site->type === \App\Enums\SiteType::LOAD_BALANCER)
+        reverse_proxy {
+            @if ($site->loadBalancerServers()->count() > 0)
+                @foreach($site->loadBalancerServers as $server)
+                    to {{ $server->ip }}:{{ $server->port }}
+                @endforeach
+            @else
+                to 127.0.0.1
+            @endif
+            @switch($site->type_data['method'] ?? \App\Enums\LoadBalancerMethod::ROUND_ROBIN)
+                @case(\App\Enums\LoadBalancerMethod::LEAST_CONNECTIONS)
+                    lb_policy least_conn
+                    @break
+                @case(\App\Enums\LoadBalancerMethod::IP_HASH)
+                    lb_policy ip_hash
+                    @break
+                @default
+                    lb_policy round_robin
+            @endswitch
+            header_up Host {host}
+            header_up X-Real-IP {remote}
+        }
+    @endif
+    @include('ssh.services.webserver.caddy.redirects', ['site' => $site])
+}