Initial commit: 23 docker stacks for GitOps deployment

Stacks included:
- Infrastructure: traefik, authentik, gitea, registry, watchtower, dockge
- Monitoring: smokeping, changedetection
- Apps: ghost, gollum, wallabag, radicale, invidious, xbackbone, filebrowser, syncthing, zerotier
- Custom: obsidian-tools, memento, perilous, ramz, bookclub, brain

🤖 Generated with Claude Code

stacks/registry/docker-compose.yml

@@ -0,0 +1,27 @@
+services:
+  registry:
+    image: registry:2
+    container_name: registry
+    restart: unless-stopped
+    volumes:
+      - ./data:/var/lib/registry
+      - ./auth:/auth
+    environment:
+      REGISTRY_AUTH: htpasswd
+      REGISTRY_AUTH_HTPASSWD_REALM: Registry Realm
+      REGISTRY_AUTH_HTPASSWD_PATH: /auth/htpasswd
+      REGISTRY_HTTP_SECRET: ${REGISTRY_HTTP_SECRET}
+    expose:
+      - 5000
+    networks:
+      - web
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.registry.entrypoints=https"
+      - "traefik.http.routers.registry.rule=Host(`registry.${DOMAIN}`)"
+      - "traefik.http.routers.registry.tls.certresolver=http"
+      - "traefik.http.services.registry.loadbalancer.server.port=5000"
+
+networks:
+  web:
+    external: true