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>

frontend/nginx.conf

@@ -0,0 +1,37 @@
+server {
+    listen 80;
+    server_name localhost;
+    root /usr/share/nginx/html;
+
+    location = /hk-planner/manifest.json {
+        add_header Cache-Control "no-cache";
+        try_files $uri =404;
+    }
+
+    location /hk-planner/api/ {
+        proxy_pass http://backend:3001/api/;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        add_header Cache-Control "no-store";
+    }
+
+    location /hk-planner/health {
+        proxy_pass http://backend:3001/health;
+    }
+
+    location ~* /hk-planner/.*\.(js|css|png|ico|svg|woff2?)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+        try_files $uri =404;
+    }
+
+    location /hk-planner/ {
+        add_header Cache-Control "no-cache" always;
+        try_files $uri $uri/ /hk-planner/index.html;
+    }
+
+    location = / {
+        return 301 /hk-planner/;
+    }
+}