Initial commit: HK Planner app

Housekeeping workload and hours planning app — port of the WP hotel
housekeeping hours calculator plugin. 7-day occupancy planner with
Newbook PMS integration, staff rota, time requirements, and pickup tracking.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,31 @@
+services:
+  hk-planner-backend:
+    build: ./backend
+    container_name: hk-planner-backend
+    restart: unless-stopped
+    environment:
+      DATABASE_URL:        ${DATABASE_URL}
+      CENTRAL_AUTH_SECRET: ${CENTRAL_AUTH_SECRET}
+      SETTINGS_URL:        ${SETTINGS_URL}
+      SETTINGS_SECRET:     ${SETTINGS_SECRET}
+      APP_SLUG:            hk-planner
+    networks:
+      - hnf_net
+
+  hk-planner-frontend:
+    build:
+      context: ./frontend
+      args:
+        VITE_HOTEL_NAME: ${VITE_HOTEL_NAME}
+    container_name: hk-planner-frontend
+    restart: unless-stopped
+    ports:
+      - "${FRONTEND_PORT:-3080}:80"
+    depends_on:
+      - hk-planner-backend
+    networks:
+      - hnf_net
+
+networks:
+  hnf_net:
+    external: true