HTML game modes selector

+ pong.css in a separate file

src/client/pong.css

@@ -0,0 +1,53 @@
+
+@font-face {
+	font-family: "Bit5x3";
+	src: url("http://localhost:8080/Bit5x3.woff2") format("woff2"),
+		url("http://localhost:8080/Bit5x3.woff") format("woff");
+	font-weight: normal;
+	font-style: normal;
+	font-display: swap;
+}
+#preload_font {
+	font-family: "Bit5x3";
+	opacity:0;
+	height:0;
+	width:0;
+	display:inline-block;
+}
+body {
+	margin: 0;
+	background-color: #222425;
+}
+#canvas_container {
+	text-align: center;
+	/* border: dashed white 5px; */
+	/* max-height: 80vh; */
+	/* overflow: hidden; */
+}
+#div_game_options {
+	text-align: center;
+	font-family: "Bit5x3";
+	color: white;
+	font-size: x-large;
+}
+#div_game_options fieldset {
+	max-width: 50vw;
+	width: auto;
+	margin: 0 auto;
+}
+#div_game_options fieldset div {
+	padding: 10px;
+}
+#play_pong_button {
+	font-family: "Bit5x3";
+	color: white;
+	background-color: #333333;
+	font-size: x-large;
+	padding: 10px;
+}
+canvas {
+	background-color: #333333;
+	max-width: 75vw;
+	/* max-height: 100vh; */
+	width: 80%;
+}