Add security and password policy customization

I need someone with a functional Docker setup to help test this :)

Tip from a new user that we are requiring stupid password stuff

https://www.bbc.com/news/technology-40875534

roles/docker/tasks/services/gitea.yml

@@ -21,3 +21,8 @@
       VIRTUAL_PORT: "3000"
       LETSENCRYPT_HOST: "{{ gitea.domain }}"
       LETSENCRYPT_EMAIL: "{{ letsencrypt_email }}"
+      # Gitea customization, see: https://docs.gitea.io/en-us/install-with-docker/#customization
+      # https://docs.gitea.io/en-us/config-cheat-sheet/#security-security
+      GITEA__security__PASSWORD_COMPLEXITY: "off"
+      GITEA__security__MIN_PASSWORD_LENGTH: "8"
+      GITEA__security__PASSWORD_CHECK_PWN: "true"