Getting everything right with your Node.js applications in Docker is hard. Features and bugs swallow your precious time, and deadlines are looming over the horizon. Following best practices right now improves your security, decreases deployment times, and saves you headaches later on.

Have you ever had a full hard drive because of Docker? I had. All those old Docker containers, images, and volumes take up so much space. Newer Docker versions have a handy cleanup command for this case.

Docker is omnipresent in the tech world today. If you are a solo developer or your team is currently using a PaaS like Heroku, you may be wondering what problem Docker solves and if it is worth adopting.