Add sample code showing off gatsby-image + image processing to query …

…with GraphQL page (#3589)

* Add sample code showing off gatsby-image + image processing to query with GraphQL page

* Update querying-with-graphql.md

* Update README.md

docs/docs/querying-with-graphql.md

@@ -159,6 +159,33 @@ Gatsby has rich support for processing images. Responsive images are a big part
 
 Combined with a special Gatsby image component, [gatsby-image](/packages/gatsby-image/), you have a very powerful set of primatives for building sites with images.
 
+This is what a component using `gatsby-image` looks like:
+
+```jsx
+import React from "react";
+import Img from "gatsby-image";
+
+export default ({ data }) => (
+  <div>
+    <h1>Hello gatsby-image</h1>
+    <Img resolutions={data.file.childImageSharp.resolutions} />
+  </div>
+);
+
+export const query = graphql`
+  query GatsbyImageSampleQuery {
+    file(relativePath: { eq: "blog/avatars/kyle-mathews.jpeg" }) {
+      childImageSharp {
+        # Specify the image processing specifications right in the query.
+        # Makes it trivial to update as your page's design changes.
+        resolutions(width: 125, height: 125) {
+          ...GatsbyImageSharpResolutions
+        }
+      }
+    }
+  }
+`;
+
 See also the following blog posts:
 
 * [Making Website Building Fun](/blog/2017-10-16-making-website-building-fun/)

packages/gatsby-image/README.md

@@ -78,7 +78,7 @@ plugins: [
 
 ## How to use
 
-This is what a component using `gatsby-images` looks like.
+This is what a component using `gatsby-image` looks like:
 
 ```jsx
 import React from "react";
@@ -95,7 +95,7 @@ export const query = graphql`
   query GatsbyImageSampleQuery {
     file(relativePath: { eq: "blog/avatars/kyle-mathews.jpeg" }) {
       childImageSharp {
-        # Specify the image processing steps right in the query
+        # Specify the image processing specifications right in the query.
         # Makes it trivial to update as your page's design changes.
         resolutions(width: 125, height: 125) {
           ...GatsbyImageSharpResolutions