Remove verbose log, add yarn build

index.js

@@ -558,7 +558,6 @@ function checkCollision(curPos, newPos, world) {
             if (block.type !== BlockType.AIR) {
                 if (i === 1 && dp[i] < 0) {
                     isOnGround = true;
-                    console.log(`on ground`);
                 }
                 dp[i] = 0;
             }

package.json

@@ -7,6 +7,7 @@
     "esbuild": "^0.14.2"
   },
   "scripts": {
-    "serve": "esbuild --outfile=app.js index.js --bundle --servedir=."
+    "serve": "esbuild --outfile=app.js index.js --bundle --sourcemap=inline --servedir=.",
+    "build": "esbuild --outfile=app.js index.js --bundle --minify"
   }
 }