Add square numbers and bug fixes

JoshHeaps.Net/wwwroot/css/chess/game.css

@@ -1,5 +1,10 @@
-#chessBoard {
+#boardContainer {
+    position: relative;
+    width: fit-content;
     margin: 2vw auto;
+}
+
+#chessBoard {
     width: 60vw;
     height: 60vw;
     display: grid;
@@ -158,4 +163,30 @@
     width: 50px;
     height: 50px;
     pointer-events: none; /* ensures img doesn't steal the click */
+}
+
+.chessSquare .coordinate-label {
+    position: absolute;
+    font-size: 1.2vw;
+    font-weight: bold;
+    pointer-events: none;
+    user-select: none;
+}
+
+.chessSquare.light .coordinate-label {
+    color: #656770;
+}
+
+.chessSquare.dark .coordinate-label {
+    color: #ccc;
+}
+
+.chessSquare .row-label {
+    top: 2px;
+    left: 4px;
+}
+
+.chessSquare .col-label {
+    bottom: 2px;
+    right: 4px;
 }