chore(static web apps): fix 404 page

staticwebapp.config.json

@@ -0,0 +1,19 @@
+{
+  "trailingSlash": "auto",
+  "routes": [
+    {
+      "route": "/*",
+      "headers": {
+        "cache-control": "must-revalidate, max-age=15770000"
+      }
+    }
+  ],
+  "responseOverrides": {
+    "404": {
+      "rewrite": "/404.html"
+    }
+  },
+  "globalHeaders": {
+    "content-security-policy": "default-src https: 'unsafe-eval' 'unsafe-inline'; object-src 'none'"
+  }
+}