First we create a basic server in Node using Express:
```js
import express from "express";
app.get("/", (req, res) => {
res.send("Graph QL test project");
});
app.listen(8080, () =>
console.log("Running server on port localhost:8080/graphql")
);
```
## Add GraphQL as middlewear
Next we introduce GraphQL as a piece of Node.js [middlewear](/Programming_Languages/Node/Architecture/Middleware.md), with the `app.use()` method.
```js
import { graphqlHTTP } from "express-graphql";
app.use(
"/graphql",
graphqlHTTP({
schema: schema,
rootValue: resolvers,
graphiql: true,
})
);
```
-`schema` is a reference to our GraphQL schema - the structure of the fields that define our server.
-`rootValue` is a reference to our resolvers.
-`graphiql` is the GUI tool that will be served from the GraphQL endpoint at `localhost:8080/graphql`. This tool enables us to interrogate our data using the defined schema and see what data we would get back from frontend queries.
