fix: idempotent Caddy subpath config, increase Docker pull timeout to 120s, extend health check to 60s

- helpers.js: treat 'No changes to apply' as success (config already exists = idempotent)
- constants.js: Docker pull timeout 30s → 120s (large images need more time)
- deploy.js: health check 40s → 60s (some apps like filebrowser are slow to start)

dashcaddy-api/constants.js

@@ -102,7 +102,7 @@ const DNS_RECORD_TYPES = ['A', 'AAAA', 'CNAME', 'MX', 'TXT', 'NS', 'SRV', 'PTR',
 // ── Docker ──────────────────────────────────────────────────────
 const DOCKER = {
   CONTAINER_PREFIX: 'sami-',
-  TIMEOUT: 30000,  // 30s — timeout for docker pull/create operations
+  TIMEOUT: 120000,  // 120s — timeout for docker pull/create operations
   LOG_CONFIG: {
     Type: 'json-file',
     Config: { 'max-size': '10m', 'max-file': '3' }  // 30MB max per container