dev: get basic PTY integration working

Author: KernelDeimos

src/emulator/assets/template.html

@@ -22,12 +22,22 @@
           line-height: 16px;
       }
       BODY {
+          padding: 0;
+          margin: 0;
           background-color: #111;
           display: flex;
           justify-content: center;
           align-items: center;
           height: 100vh;
           overflow: hidden;
+          background: linear-gradient(135deg, #232323 50%, transparent 50%) 0% 0% / 3em 3em #101010;
+          background-position: center center;
+          background-size: 5px 5px;
+      }
+      #screen_container {
+        padding: 5px;
+        background-color: #000;
+        box-shadow: 0 0 32px 0 rgba(0,0,0,0.7);
       }
   </style>
 </head>