Allow build folder

.gitignore

@@ -28,7 +28,6 @@ ehthumbs.db
 # Unity generated
 # ===============
 [Oo]bj/
-[Bb]uild
 sysinfo.txt
 *.stackdump
-Library
+Library

public/Build/Build.json

@@ -0,0 +1,13 @@
+{
+"companyName": "DefaultCompany",
+"productName": "Hanoi",
+"dataUrl": "Build.data.unityweb",
+"wasmCodeUrl": "Build.wasm.code.unityweb",
+"wasmFrameworkUrl": "Build.wasm.framework.unityweb",
+"TOTAL_MEMORY": 268435456,
+"graphicsAPI": ["WebGL 2.0", "WebGL 1.0"],
+"webglContextAttributes": {"preserveDrawingBuffer": false},
+"splashScreenStyle": "Dark",
+"backgroundColor": "#231F20",
+"cacheControl": {"default": "must-revalidate"}
+}