Add vercel.json

vercel.json

@@ -0,0 +1,48 @@
+{
+  "buildCommand": "npm run docs:build",
+  "installCommand": "npm ci",
+  "outputDirectory": "docs",
+  "github": {
+    "silent": true
+  },
+  "cleanUrls": true,
+  "headers": [
+    {
+      "source": "/(.*)",
+      "headers": [
+        {
+          "key": "Content-Security-Policy",
+          "value": "default-src 'self'; script-src 'self' 'unsafe-inline'; connect-src 'self' data:; img-src 'self' https://img.shields.io https://github.com; style-src 'self' 'unsafe-inline'"
+        },
+        {
+          "key": "X-DNS-Prefetch-Control",
+          "value": "on"
+        },
+        {
+          "key": "Referrer-Policy",
+          "value": "same-origin"
+        },
+        {
+          "key": "Strict-Transport-Security",
+          "value": "max-age=63072000; includeSubdomains; preload"
+        },
+        {
+          "key": "X-Content-Type-Options",
+          "value": "nosniff"
+        },
+        {
+          "key": "X-Frame-Options",
+          "value": "SAMEORIGIN"
+        },
+        {
+          "key": "X-XSS-Protection",
+          "value": "1; mode=block"
+        },
+        {
+          "key": "Permissions-Policy",
+          "value": "geolocation=(), camera=(), microphone=(), payment=()"
+        }
+      ]
+    }
+  ]
+}