Add markdown page generation

gatsby-config.js

@@ -27,8 +27,13 @@ module.exports = {
         icon: `src/images/gatsby-icon.png`, // This path is relative to the root of the site.
       },
     },
-    // this (optional) plugin enables Progressive Web App + Offline functionality
-    // To learn more, visit: https://gatsby.dev/offline
-    // `gatsby-plugin-offline`,
+    {
+      resolve: `gatsby-source-filesystem`,
+      options: {
+        name: `markdown-pages`,
+        path: `${__dirname}/src/markdown-pages`,
+      },
+    },
+    `gatsby-transformer-remark`,
   ],
-}
+};

gatsby-node.js

@@ -1,7 +1,38 @@
-/**
- * Implement Gatsby's Node APIs in this file.
- *
- * See: https://www.gatsbyjs.org/docs/node-apis/
- */
+const path = require(`path`);
 
-// You can delete this file if you're not using it
+exports.createPages = async ({ actions, graphql, reporter }) => {
+  const { createPage } = actions;
+
+  const blogPostTemplate = path.resolve(`src/templates/example-template.js`);
+
+  const result = await graphql(`
+    {
+      allMarkdownRemark(
+        sort: { order: DESC, fields: [frontmatter___date] }
+        limit: 1000
+      ) {
+        edges {
+          node {
+            frontmatter {
+              path
+            }
+          }
+        }
+      }
+    }
+  `);
+
+  // Handle errors
+  if (result.errors) {
+    reporter.panicOnBuild(`Error while running GraphQL query.`);
+    return;
+  }
+
+  result.data.allMarkdownRemark.edges.forEach(({ node }) => {
+    createPage({
+      path: node.frontmatter.path,
+      component: blogPostTemplate,
+      context: {}, // additional data can be passed via context
+    });
+  });
+};