chore(examples): add security headers to dashboard app example (#6953)

Author: jnomeisky

examples/react-dashboard/dashboard-app/.netlify/state.json

@@ -87,9 +87,9 @@
     "workbox-webpack-plugin": "4.2.0"
   },
   "scripts": {
-    "start": "node scripts/start.js",
-    "build": "node scripts/build.js",
-    "test": "node scripts/test.js",
+    "start": "export SET NODE_OPTIONS=--openssl-legacy-provider && node scripts/start.js",
+    "build": "export SET NODE_OPTIONS=--openssl-legacy-provider && node scripts/build.js",
+    "test": "export SET NODE_OPTIONS=--openssl-legacy-provider && node scripts/test.js",
     "preview": "netlify deploy --dir build",
     "deploy": "netlify deploy --prod --dir build"
   },

examples/react-dashboard/dashboard-app/package.json

@@ -0,0 +1,18 @@
+{
+    "headers": [
+      {
+        "source": "/(.*)",
+        "headers": [
+          {
+            "key": "Strict-Transport-Security",
+            "value": "max-age=31536000; includeSubDomains;"
+          },
+          {
+            "key": "Content-Security-Policy",
+            "value": "default-src 'self'; script-src 'report-sample' 'self' https://www.datadoghq-browser-agent.com/datadog-logs-v4.js 'unsafe-inline'; style-src 'report-sample' 'self' https://fonts.googleapis.com 'unsafe-inline'; object-src 'none'; base-uri 'self'; connect-src 'self' https://graphql.contentful.com https://harsh-eel.aws-us-east-2.cubecloudapp.dev https://track.cube.dev https://identity.cube.dev https://logs.browser-intake-datadoghq.com; font-src 'self' https://fonts.gstatic.com https://static.cube.dev; frame-src 'self'; img-src 'self' data: https://static.cube.dev; manifest-src 'self'; media-src 'self'; worker-src 'none';"
+          }
+        ]
+      }
+    ]
+  }
+