We have already generated an example HTML file from the markdown source earlier in this chapter. You used the following command to do so:

docker run -v `pwd`:/source denysvuika/pandoc -f markdown -t html5 test.md -o test.html

Our editor needs to perform the following steps to run the same command programmatically:

• Send the markdown text to the Node.js process.
• Save the markdown text to the local drive.
• Invoke the Docker command to generate the HTML output.
• Open the browser with the end result (this is optional).

Let's go through this now, starting with sending the markdown text to the Node.js process.