AbdelhaqNouhi/docker-test

Docker

package software so it can run on any hardware

in order to understand how that process works there are three things that you absolutely must know

docker file: is a blueprint for building a docker image

image: is a template for running the docker container

container: is a running process

How to build a project

Create a docker file

  mkdir Dockerfile

Here's an example of a simple Dockerfile

FROM node:16.16.0

WORKDIR /src

COPY package*.json ./
RUN npm install
COPY .  .

ENV PORT=3000
EXPOSE 3000
CMD ["npm", "start"]

build a docker image and give the name of the image

  docker build -t docker-image-express .

run a docker image by running

docker run -p 8000:3000 --name docker-express docker-image-express

volumes

is a dedicated folder on the host machine and insured this folder a container can create files that can be remounted into future containers or multiple containers at the same time

docker-compose

is a tool for running multiple docker containers at the same time

Create a docker-compose

  mkdir docker-compose.yml

Here's an example of a simple docker-compose

version: '3'
services:
  web:
    build: .
    ports:
      - "3000:3000"
    depends_on:
      - db
  db:
    image: mongo
    environment:
      MONGO_USER: mongo
      MONGO_PASSWORD: password

and now you can run this command

  docker-compose up

now all the containers run together

enjoy