examples improvement - hardened, joomla, kubernetes, load-balancer and moodle

examples/hardened/README.md

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+# Hardened
+
+Example on how you can harden the container executing bunkerized-nginx. See the [documentation](https://bunkerized-nginx.readthedocs.io/en/latest/security_tuning.html#container-hardening) for details.
+
+## Architecture
+
+<img src="https://github.com/bunkerity/bunkerized-nginx/blob/dev/examples/hardened/architecture.png?raw=true" />
+
+## Docker
+
+See [docker-compose.yml](https://github.com/bunkerity/bunkerized-nginx/blob/master/examples/hardened/docker-compose.yml).