convert website from hugo to gatsby (#1369)

website/gatsby-config.js

@@ -0,0 +1,96 @@
+const pkg = require('./package.json');
+
+const neatgrid = require('postcss-neat');
+const nestedcss = require('postcss-nested');
+const colorfunctions = require('postcss-colour-functions');
+const hdBackgrounds = require('postcss-at2x');
+const cssextend = require('postcss-simple-extend');
+const cssvars = require('postcss-simple-vars-async');
+
+const styleVariables = require('./src/theme');
+
+const postCssPlugins = [
+  neatgrid(),
+  nestedcss(),
+  colorfunctions(),
+  hdBackgrounds(),
+  cssextend(),
+  cssvars({ variables: styleVariables })
+];
+
+module.exports = {
+  siteMetadata: {
+    title: 'Netlify CMS | Open-Source Content Management System',
+    description: 'Open source content management for your Git workflow',
+    siteUrl: pkg.homepage,
+    menu: {
+      docs: [
+        {
+          name: 'start',
+          title: 'Quick Start'
+        },
+        {
+          name: 'guides',
+          title: 'Guides'
+        },
+        {
+          name: 'reference',
+          title: 'Reference'
+        },
+        {
+          name: 'contributing',
+          title: 'Contributing'
+        }
+      ]
+    }
+  },
+  plugins: [
+    {
+      resolve: 'gatsby-source-filesystem',
+      options: {
+        path: `${__dirname}/content`,
+        name: 'content'
+      }
+    },
+    'gatsby-transformer-yaml',
+    'gatsby-transformer-json',
+    {
+      resolve: 'gatsby-source-filesystem',
+      options: {
+        path: `${__dirname}/data`,
+        name: 'data'
+      }
+    },
+    {
+      resolve: 'gatsby-transformer-remark',
+      options: {
+        // prettier-ignore
+        plugins: [
+          'gatsby-remark-autolink-headers',
+          'gatsby-remark-prismjs'
+        ]
+      }
+    },
+    {
+      resolve: 'gatsby-plugin-postcss-sass',
+      options: {
+        postCssPlugins
+      }
+    },
+    'gatsby-plugin-react-helmet',
+    'gatsby-plugin-react-next',
+    'gatsby-plugin-catch-links',
+    {
+      resolve: `gatsby-plugin-manifest`,
+      options: {
+        name: 'NetlifyCMS',
+        short_name: 'NetlifyCMS',
+        start_url: '/',
+        background_color: '#ffffff',
+        theme_color: '#ffffff',
+        display: 'standalone',
+        icon: 'static/img/favicon/icon-512x512.png'
+      }
+    }
+  ]
+};