Docker: Add install-docker.sh script

Signed-off-by: Michael Mayer <michael@photoprism.app>

scripts/dist/install-docker.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+# Installs Docker on Ubuntu Linux
+# bash <(curl -s https://raw.githubusercontent.com/photoprism/photoprism/develop/scripts/dist/install-docker.sh)
+
+echo "Installing Docker..."
+set -e
+
+# Install distribution packages.
+sudo apt-get update
+sudo apt-get install ca-certificates curl gnupg lsb-release
+
+# Install key.
+sudo mkdir -p /etc/apt/keyrings
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+sudo chmod a+r /etc/apt/keyrings/docker.gpg
+
+echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
+  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+
+# Install Docker with Compose Plugin.
+sudo apt-get update
+sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin
+
+# Verify installation works.
+sudo docker run hello-world