Merge pull request graphql#1162 from Eomm/patch-1

add: mercurius server module

Author: orta

src/content/code/language-support/javascript/server/mercurius.md

@@ -0,0 +1,45 @@
+---
+name: Mercurius
+description: Mercurius is a flexible and extendible GraphQL adapter for Fastify, a blazing-fast web framework with the least overhead and a powerful plugin architecture.
+url: https://mercurius.dev/
+github: mercurius-js/mercurius
+npm: "mercurius"
+---
+
+To run an hello world script with `mercurius`:
+
+```bash
+npm install fastify mercurius
+```
+
+Then run `node app.js` with this code in `app.js`:
+
+```js
+const Fastify = require('fastify')
+const mercurius = require('mercurius')
+
+const schema = `
+  type Query {
+    hello(name: String): String!
+  }
+`
+
+const resolvers = {
+  Query: {
+    hello: async (_, { name }) => `hello ${name || 'world'}`
+  }
+}
+
+const app = Fastify()
+app.register(mercurius, {
+  schema,
+  resolvers
+})
+
+app.listen(3000)
+
+// Call IT!
+// curl 'http://localhost:3000/graphql' \
+//  -H 'content-type: application/json' \
+//  --data-raw '{"query":"{ hello(name:\"Marcurius\") }" }'
+```