Add ability to expose TCP connections (#123)

config/expose.php

@@ -151,6 +151,24 @@ return [
         */
         'validate_auth_tokens' => false,
 
+        /*
+        |--------------------------------------------------------------------------
+        | TCP Port Range
+        |--------------------------------------------------------------------------
+        |
+        | Expose allows you to also share TCP ports, for example when sharing your
+        | local SSH server with the public. This setting allows you to define the
+        | port range that Expose will use to assign new ports to the users.
+        |
+        | Note: Do not use port ranges below 1024, as it might require root
+        | privileges to assign these ports.
+        |
+        */
+        'tcp_port_range' => [
+            'from' => 50000,
+            'to' => 60000,
+        ],
+
         /*
         |--------------------------------------------------------------------------
         | Maximum connection length
@@ -232,6 +250,8 @@ return [
             'subdomain_taken' => 'The chosen subdomain :subdomain is already taken. Please choose a different subdomain.',
 
             'custom_subdomain_unauthorized' => 'You are not allowed to specify custom subdomains. Please upgrade to Expose Pro.',
+
+            'no_free_tcp_port_available' => 'There are no free TCP ports available on this server. Please try again later.',
         ],
     ],
 ];