How to cook 👨‍🍳 Docker with React. Part 1 — Base Theory and commands.

If you can create a container — do it!

Photo by Ian Taylor on Unsplash

Basis

Docker. For what?

Docker allows to create and run packed containers.

Container — isolated environment with application (or without). With this application can interact OS where this container is run.

So we can run as many apps with their environment as we wish :) Without any installations, only Docker. At the same time these apps can interact with each others.

Terms of Docker

• Docker daemon — a service for working with containers.
• Docker client — cli for daemon management Docker daemon (^).
• Docker image — unchangeable file which can run container. Applications being packed exactly in images, from whom runs containers.
• Dicker container — runned from image working (hope so) application.
• Docker registry — repository (storage) with docker images.

Dockerfile — file-instruction how to build docker image.

Docker commands

Source:

Use the Docker command line

Main (useful) commands of Docker CLI

• run — command for running container. The docker run command first creates a writeable container layer over the specified image, and then starts it using the specified command.
• push — pushes image to repository
• ps — shows the list of containers
• attach — connects to running container
• rm — deletes container(s)
• rmi — deletes image(s)
• start/stop/restart — action with container :)
• build — creates image from Dockerfile

Dockerfile reference

Main (useful) commands Dockerfile

• FROM — initalizes new step of building and sets base image
• RUN — executes command in a container. Execute any commands in a new layer on top of the current image and commit the results. The resulting committed image will be used for the next step in the Dockerfile.
• ENV — sets env variable
• WORKDIR — sets working directory, where next commands will be executed
• CMD — sets default args for container’s ENTRYPOINT
• ENTRYPOINT — configures what will be runned on container’s start
• EXPOSE — “says” to the Docker which port should listen container on running
• COPY — copies files from to container

Summary

• For the app instruction’s creation (how, where and what app should to do) exists Dockerfile
• For running commands Docker as service and image’s creation and then running exists Docker CLI

As more claps I get as soon Practice part comes :)