Launch HN: LayerCI (YC S20) - Staging servers that act like (and replace) CI Hi HN, Lyn & Colin here. We’re co-founders of LayerCI ( https://layerci.com ), which gives you a modern DevOps experience (CI/CD & staging environments) with as little work as writing a Dockerfile. Most teams need CI/CD (run the build and deploy every time a developer pushes) or staging (host a server with my app in it to share), but current approaches always have at least one of these problems: - Simplistic (only run unit tests) - Slow (wait 10 minutes to run the same repetitive setup steps like "npm install") - Complex (cache keys, base images, a slack channel to reserve staging servers, …) We’ve spent over a year iterating with our customers to build a product that solves all of these problems. Our configuration files (Layerfiles) look like Dockerfiles, so regular developers can write and maintain them. Here's one that creates a staging server for create-react-app: FROM vm/ubuntu:18.04...