FEATURE: add the ability to zoom in and out using touch screen

front/src/Touch/TouchScreenManager.ts

@@ -0,0 +1,16 @@
+
+class TouchScreenManager {
+    
+    readonly supportTouchScreen:boolean;
+    
+    constructor() {
+        this.supportTouchScreen = this.detectTouchscreen();
+    }
+
+    //found here: https://stackoverflow.com/questions/4817029/whats-the-best-way-to-detect-a-touch-screen-device-using-javascript#4819886
+    detectTouchscreen(): boolean {
+        return (('ontouchstart' in window) || (navigator.maxTouchPoints > 0) || (navigator.msMaxTouchPoints > 0));
+    }
+}
+
+export const touchScreenManager = new TouchScreenManager();