fix: Fix responsiveness by adding magical meta tag (#45)

_includes/head.html

@@ -2,20 +2,21 @@
     <meta charset="UTF-8">
     <meta content="IE=Edge" http-equiv="X-UA-Compatible">
     <meta name="description" content="Flame Engine Website">
-  
+
     <!-- iOS meta tags & icons -->
     <meta name="apple-mobile-web-app-capable" content="yes">
     <meta name="apple-mobile-web-app-status-bar-style" content="black">
     <meta name="apple-mobile-web-app-title" content="Flame Engine Website">
     <link rel="apple-touch-icon" href="assets/icons/Icon-192.png">
-  
+
     <!-- Favicon -->
     <link rel="icon" type="image/png" href="assets/icons/favicon.png"/>
-  
+
     <title>Flame Engine</title>
     <base href="/">
     <link rel="manifest" href="manifest.json">
-
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta data-react-helmet="true" name="description" content="2D game engine made on top of Flutter"/>
     <meta data-react-helmet="true" property="og:title" content="Flame"/>
     <meta data-react-helmet="true" property="og:description" content="2D game engine made on top of Flutter"/>