Introduce forward-ssh.sh method & reorganize

- Abandoned update-hosts.sh in favor of loopback SSH forwarding
- Adopted *.local.krislamo.org as a wildcard loopback domain
- Bound Traefik to ports 443/80 on Dockerbox dev
- Removed outdated Gitea config from Dockerbox
- Relocated production playbooks to a new directory

playbooks/docker.yml

@@ -0,0 +1,7 @@
+- name: Install Docker Server
+  hosts: "{{ PLAYBOOK_HOST | default('none') }}"
+  become: true
+  roles:
+    - base
+    - jenkins
+    - docker