Merge pull request graphql#1058 from verneleem/patch-1

Create dgraph.md

Author: orta

src/content/code/services/dgraph.md

@@ -0,0 +1,114 @@
+---
+name: Dgraph
+description: Dgraph is a native GraphQL database with a graph backend. This means Dgraph is not an interface on top of an existing database like Postgres but is actually designed from the ground-up for GraphQL. It is optimized for speed and performance, depending on multiple computer science breakthroughs to get the best result. Dgraph Cloud is a fully managed GraphQL backend service that lets you iterate faster, without worrying about your infrastructure.
+url: https://dgraph.io/graphql
+github: dgraph-io/dgraph
+---
+
+Install Steps if running locally on linux not on Dgraph Cloud:
+
+```bash
+docker pull dgraph/standalone
+mkdir -p ~/dgraph
+docker run -it -p 5080:5080 -p 6080:6080 -p 8080:8080 \
+  -p 9080:9080 -p 8000:8000 -v ~/dgraph:/dgraph --name dgraph \
+  dgraph/standalone:master
+```
+
+Set your GraphQL Schema:
+
+```bash
+touch schema.graphql
+nano schema.graphql
+```
+
+```graphql
+type Product {
+  id: ID!
+  name: String! @id
+  reviews: [Review] @hasInverse(field: about)
+}
+
+type Customer {
+  username: String! @id
+  reviews: [Review] @hasInverse(field: by)
+}
+
+type Review {
+  id: ID!
+  about: Product!
+  by: Customer!
+  comment: String @search(by: [fulltext])
+  rating: Int @search
+}
+```
+
+```bash
+curl -X POST localhost:8080/admin/schema --data-binary '@schema.graphql'
+```
+
+Fire up your favorite GraphQL Client pointed at `http://localhost:8080/graphql` and run mutations and queries
+
+```graphql
+mutation {
+  addProduct(input: [
+    { name: "Dgraph"},
+    { name: "Dgraph Cloud"}
+  ]) {
+    product {
+      id
+      name
+    }
+  }
+  addCustomer(input: [{ username: "TonyStark"}]) {
+    customer {
+      username
+    }
+  }
+}
+```
+
+```graphql
+mutation {
+  addReview(input: [{
+    by: { username: "TonyStark" }, 
+    about: { name: "Dgraph" }, 
+    comment: "Fantastic, easy to install, worked great. Best GraphQL server available",
+    rating: 10
+  }]) {
+    review {
+      id
+      comment
+      rating
+      by { username }
+      about { id name }
+    }
+  }
+}
+```
+
+```
+query {
+  queryReview(filter: { comment: { alloftext: "server easy install" }, rating: { gt: 5 } }) {
+    comment
+    by {
+      username
+      reviews(order: { desc: rating }, first: 10) {
+        about {
+          name
+          reviews(order: { asc: rating, first: 5 }) {
+            by { username }
+            comment
+            rating
+          }
+        }
+        rating
+      }
+    }
+    about {
+      name
+    }
+  }
+}
+```
+