Add typescript example

Author: femioladipo

example/node/package.json

@@ -0,0 +1,9 @@
+{
+  "name": "node",
+  "private": true,
+  "license": "MIT",
+  "dependencies": {
+    "express": "^5.1.0",
+    "json-graphql-server": "../../"
+  }
+}

example/node/server.ts

@@ -0,0 +1,11 @@
+import express from 'express';
+import jsonGraphqlExpress, { getPlainSchema } from 'json-graphql-server/node';
+import data from '../data.cjs'
+
+const PORT = 3000;
+const app = express();
+
+const plainSchema = getPlainSchema(data);
+
+app.use('/graphql', jsonGraphqlExpress(data));
+app.listen(PORT);