chore: add nginx config

nginx/conf.d/default.conf

@@ -0,0 +1,12 @@
+server {
+    listen 80;
+    root /app;
+    include mime.types;
+    types {
+        application/wasm wasm;
+    }
+
+    location / {
+        index index.html;
+    }
+}