Add Content - "Things I don't know" post

[raulfdm]

Related #43

Limitation

gatsby-remark-images has an option that allow us to convert the title to markdown instead text.

However, it seems bit broken:

gatsbyjs/gatsby#20000

 ERROR 

UNHANDLED REJECTION Cannot read property 'contentDigest' of undefined



  TypeError: Cannot read property 'contentDigest' of undefined
  
  - extend-node-type.js:61 htmlAstCacheKey
    [medium-blog]/[gatsby-transformer-remark]/extend-node-type.js:61:87
  
  - extend-node-type.js:330 getHTMLAst
    [medium-blog]/[gatsby-transformer-remark]/extend-node-type.js:330:41
  
  - extend-node-type.js:355 Object.getHTML [as generateHTML]
    [medium-blog]/[gatsby-transformer-remark]/extend-node-type.js:355:27
  
  - index.js:150 getImageCaption
    [medium-blog]/[gatsby-remark-images]/index.js:150:21
  
  - index.js:302 generateImagesAndUpdateNode$
    [medium-blog]/[gatsby-remark-images]/index.js:302:52
  
  - task_queues.js:59 runNextTicks
    internal/process/task_queues.js:59:5
  
  - timers.js:412 processImmediate
    internal/timers.js:412:9
  

not finished createPages - 0.565s
not finished Generating image thumbnails - 0.562s
error Command failed with exit code 1.

Which means the links on the img title won't be parsed as HTML: