Moved tabletop under public/assets so it will load via webpack

Signed-off-by: James Ketrenos <james_eikona@ketrenos.com>

client/src/Board.js

@@ -122,7 +122,7 @@ const Board = ({ game }) => {
   ]);
 
   return (
-    <div className="Board" style={{backgroundImage: `url(${assetsPath}/gfx/tabletop.png)`}}>
+    <div className="Board">
       { borders }
       { tiles }
       { pips }

client/src/Table.css

@@ -5,6 +5,7 @@
   overflow: hidden;
   height: 100%;
   justify-content: right;
+  background-image: url("./assets/tabletop.png");
 }
 
 .Display {