Add healthcheck to ensure nginx waits for uvicorn

- Web service has healthcheck on /api/health
- nginx depends on web being healthy before starting
- Added curl to Dockerfile for healthcheck

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

docker-compose.yml

@@ -7,7 +7,8 @@ services:
       - ./nginx.conf:/etc/nginx/nginx.conf:ro
       - ./kjvstudy_org/static:/app/kjvstudy_org/static:ro
     depends_on:
-      - web
+      web:
+        condition: service_healthy
     restart: unless-stopped
 
   web:
@@ -23,3 +24,9 @@ services:
       - DISABLE_ANALYTICS=true
     restart: unless-stopped
     command: uv run uvicorn kjvstudy_org.server:app --host 0.0.0.0 --port 8001 --reload --reload-include '*.json'
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8001/api/health"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+      start_period: 10s