create your own docker registry on ubuntu 18.04 (tested especially on digitalocean)

registry-builder.sh

#
# This script will make it easier your private docker registry 
# build process on Ubuntu 18.04.
# It may require press enter during works.
#
# I recommend to run this script on initial server setup 
# that contain Ubuntu 18.04.
#
# Created by Furkan Basaran <github.com/@frknbasaran> 
# at 26.07.2020
#
# Do not forget to replace "registry.pengudb.com" with your own domain.
#
# Sample usage:
# ./registry-builder.sh your-registry-username
#

# update package sources for apt
sudo apt update

# install docker 
sudo apt install docker.io

# install docker compose via curl
# version 1.21.2
sudo curl -L https://github.com/docker/compose/releases/download/1.21.2/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose

# set permissions for executable
sudo chmod +x /usr/local/bin/docker-compose

# install nginx
sudo apt install nginx

# set firewall whitelist for nginx (ufw - digitalocean)
sudo ufw allow 'Nginx HTTP'

# make nginx configurations
wget https://gist.githubusercontent.com/frknbasaran/9afaeaaa161324b3027b7ff3e1186e2d/raw/3661bc6c3191c1288d24b8c0ad452769493322f5/registry.pengudb.com
sudo mv registry.pengudb.com /etc/nginx/sites-available/registry.pengudb.com
sudo ln -s /etc/nginx/sites-available/registry.pengudb.com /etc/nginx/sites-enabled/
wget https://gist.githubusercontent.com/frknbasaran/8c1a32731e70648a8ac3fa267a958c0c/raw/7466230080ae08ef1e157061c5609d938cd1c9dd/nginx.conf
mv nginx.conf /etc/nginx/nginx.conf

# set up apache2 authentication
mkdir /root/docker-registry
sudo apt install apache2-utils
sudo mkdir ~/docker-registry/auth && cd $_
htpasswd -Bc registry.password $1

# get docker-compose yaml file for registry
cd /root/docker-registry
wget https://gist.githubusercontent.com/frknbasaran/3a02472e703f7a8684c5f010563041e7/raw/01f12a8fa841279d432aa407b70882e1c4a3496b/docker-compose.yml

# restart nginx
nginx -s reload

# run
docker-compose up -d