Docker

Build an image

# Build the image for multiple architectures
docker buildx build --platform linux/amd64,linux/arm64,linux/armv7 -t myregistry/myimage:latest .

Push an image to DockerHub

docker buildx push --platform linux/amd64,linux/arm64,linux/armv7 myregistry/myimage:latest

Run composer from docker

docker run --rm -v $(pwd):/app composer

Quick start a ubuntu container

docker run --rm -it ubuntu /bin/bash

Network

Create a network

sudo docker network create my_docker_network --subnet 172.46.0.0/20

Run a container on the freshly created network with a custom IP

docker run --rm --net my_docker_network --ip 172.46.0.1 -p 8080:80 nginx

When using UFW, allow the traffic to the previously created container

sudo ufw route allow proto tcp from any to 172.46.0.1 port 80

Check if it works

curl http://{public_ip}:8080 ## Should return the nginx welcome page

Remove dangling volumes

docker volume rm `docker volume ls -q -f dangling=true`