Initial infrastructure mono-repo scaffold

Consolidates nixos, docker, raspi, and debian-configuration into a single
infrastructure-as-code repo. Includes:

- ansible/: full inventory + proxmox-hardening, freeipa, and raspberrypi
  roles (converted from debian-configuration bash scripts)
- terraform/: Proxmox VMs, Dynu DNS, Pi-hole (decommissioned stub),
  Docker container catalog — migrated from docker/infrastructure/terraform/
- stacks/docker/, stacks/raspi/, nixos/: placeholder READMEs pending
  git subtree population (see implementation plan)
- docs/: internal MkDocs site with architecture, network topology, runbooks,
  and drift-detection guide; external sanitized site
- scripts/: drift-detect.sh, docs-build.sh, install-hooks.sh, check-secrets.sh
- CI: secret-scan (push/PR), drift-detect (daily), docs-build (on change)
- Pi-hole removed throughout — DNS is FreeIPA, DHCP is router

See docs/internal/implementation-plan.md for the phased rollout after
pushing to Gitea.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UvNjoxTWEDkhXsd1Dq2ETP

terraform/docker/traefik.tf

@@ -0,0 +1,69 @@
+resource "docker_container" "traefik" {
+  name  = local.docker_containers["traefik"].container_name
+  image = local.docker_containers["traefik"].image
+
+  restart = local.docker_containers["traefik"].restart_policy
+
+  network_mode = "core_traefik"
+
+  ports {
+    internal = 80
+    external = 80
+    protocol = "tcp"
+  }
+
+  ports {
+    internal = 443
+    external = 443
+    protocol = "tcp"
+  }
+
+  mounts {
+    type      = "bind"
+    source    = "/home/nixos/docker/core/traefik/data/letsencrypt"
+    target    = "/letsencrypt"
+    read_only = false
+  }
+
+  mounts {
+    type      = "bind"
+    source    = "/home/nixos/docker/core/traefik/data/logs"
+    target    = "/logs"
+    read_only = false
+  }
+
+  mounts {
+    type      = "bind"
+    source    = "/home/nixos/docker/core/traefik/certs"
+    target    = "/etc/traefik/certs"
+    read_only = true
+  }
+
+  mounts {
+    type      = "bind"
+    source    = "/home/nixos/docker/core/traefik/dynamic.yml"
+    target    = "/etc/traefik/dynamic.yml"
+    read_only = true
+  }
+
+  mounts {
+    type      = "bind"
+    source    = "/home/nixos/docker/core/traefik/traefik.yml"
+    target    = "/etc/traefik/traefik.yml"
+    read_only = true
+  }
+
+  mounts {
+    type      = "bind"
+    source    = "/home/nixos/docker/core/traefik/data/plugins"
+    target    = "/plugins-storage"
+    read_only = false
+  }
+
+  lifecycle {
+    ignore_changes = [
+      env,
+      labels,
+    ]
+  }
+}