Add vercel.json for default React vite.js template (#755)

Fixes #741 
See: https://vercel.com/docs/project-configuration#rewrites-examples

e2e-tests/snapshots/capacitor.spec.ts_upgraded-capacitor.txt

@@ -7801,6 +7801,18 @@ export default {
     },
     extend: {
       colors: {
+        border: "hsl(var(--border))",
+        input: "hsl(var(--input))",
+        ring: "hsl(var(--ring))",
+        background: "hsl(var(--background))",
+        foreground: "hsl(var(--foreground))",
+        primary: {
+          DEFAULT: "hsl(var(--primary))",
+          foreground: "hsl(var(--primary-foreground))",
+        },
+        secondary: {
+          DEFAULT: "hsl(var(--secondary))",
+          foreground: "hsl(var(--secondary-foreground))",
         },
         destructive: {
           DEFAULT: "hsl(var(--destructive))",