Infra

Vagrant You put code into environments Run provisioning script onto VM => installs correct software (node.js version, user permissions, config)

Docker You build your environment and can run it anywhere Runs off of containers. Dockerfile builds a docker image. Docker image: complete app code that will sit on top of a machine (you don't store the machine on the image) Run docker image in a container. Push that image to Docker Hub (or others) Any other machine can run your IMAGE. [docker run myProjectImage] -> Since the image contains the entire image you don't need to install any software on that new machine -> In other words, no need to install npm, node.js, etc. -> Cloud Clusters: All the computers to act as one; share resources. Spin up containers all run in the cluster. nginx: Can spin up an nginx container and load balance the containers and provide a port to allow one to access the app.