fix: Empty anchors no longer crash the rendering process

server/configure.js

@@ -102,7 +102,7 @@ module.exports = (port, spinner) => {
       },
       () => {
         const os = require('os')
-        if (os.totalmem() < 1024 * 1024 * 768) {
+        if (os.totalmem() < 1000 * 1000 * 768) {
           throw new Error('Not enough memory. Minimum is 768 MB.')
         }
         return _.round(os.totalmem() / (1024 * 1024)) + ' MB of system memory available. Minimum is 768 MB.'

server/libs/markdown.js

@@ -110,7 +110,7 @@ const parseTree = (content) => {
     if (heading.type === 'inline') {
       let content = ''
       let anchor = ''
-      if (heading.children && heading.children[0].type === 'link_open') {
+      if (heading.children && heading.children.length > 0 && heading.children[0].type === 'link_open') {
         content = heading.children[1].content
         anchor = _.kebabCase(content)
       } else {