Add default width parameter to resizer

.env.sample

@@ -0,0 +1,3 @@
+ROOT_DOMAIN=https://lewisdale.dev
+DB_NAME=image_resizer.db
+DEFAULT_WIDTH=600

src/Lib/Resizer.php

@@ -26,7 +26,7 @@ class Resizer
         }
 
         // Fetch the image at the given URL
-        $original_img = Image::fromUrl($_ENV['root_domain'] . $path);
+        $original_img = Image::fromUrl($_ENV['ROOT_DOMAIN'] . $path);
         $converted = $this->createVariant($original_img, $params);
 
         // Store the image in the database
@@ -44,9 +44,7 @@ class Resizer
     {
         $quality = $params->quality ?: -1;
 
-        if ($params->width) {
-            $original->toWidth($params->width);
-        }
+        $original->toWidth($params->width ?? intval($_ENV["DEFAULT_WIDTH"]));
 
         return $original->encode($quality);
     }