Improve the docker container spin-up script

I'm preparing for reproducibility, if that's not clear

contrib/docker.sh

@@ -8,8 +8,8 @@
 set -e
 if [ -n "$ANSIBLE_SSH_KEY" ]; then
 	# Set up an unprivileged user with the same UID-GID as the user who owns the volume
-	targetUID="$(stat -c %u /etc/ansible)"
-	targetGID="$(stat -c %g /etc/ansible)"
+	targetUID="$(stat -c %u /etc/ansible.orig)"
+	targetGID="$(stat -c %g /etc/ansible.orig)"
 	printf "\e[37mCreating a user with $targetUID:$targetGID...\e[0m\n"
 	groupadd ansible -g "$targetGID"
 	useradd ansible \
@@ -37,10 +37,18 @@ if [ -n "$ANSIBLE_SSH_KEY" ]; then
 	printf '\e[37mUpdating repositories...\e[0m\n'
 	apt-get update > /dev/null 2>&1
 	printf '\e[37mInstalling packages from APT...\e[0m\n'
-	apt-get install -y openssh-client python3-docker python3-pip sudo vim > /dev/null 2>&1
+	apt-get install -y openssh-client python-is-python3 python3-docker python3-pip rsync sudo vim > /dev/null 2>&1
 	printf '\e[37mInstalling packages from PIP (this may take a minute)...\e[0m\n'
 	pip install -q ansible ansible-lint
 
+	# Setup our playbook environment roles
+	printf '\e[37mCreating local copy of playbook files...\e[0m\n'
+	mkdir /etc/ansible
+	chown ansible. /etc/ansible
+	sudo -u ansible rsync -aHS /etc/ansible.orig /etc/ansible --exclude .git
+	printf '\e[37mInstalling roles...\e[0m\n'
+	sudo -u ansible ansible-galaxy install -r roles/requirements.yml -p roles
+
 	# Drop to the ansible user
 	printf '\e[32mAnsible is ready to run\e[0m\n'
 	printf ' * \e[33mThe repo is located at /etc/ansible\e[0m\n'
@@ -54,6 +62,6 @@ fi
 ANSIBLE_SSH_KEY="$(cat ~/.ssh/desu)"
 docker run -it \
 	-e "ANSIBLE_SSH_KEY=$ANSIBLE_SSH_KEY" \
-	-v "$PWD:/etc/ansible" \
+	-v "$PWD:/etc/ansible.orig:ro" \
 	ubuntu:focal \
 	bash -c 'cd /etc/ansible && ./contrib/docker.sh && exec bash'