docker-setup.sh: add --hub-customer/--hub-password flags for Hub config download

When both flags are provided, the wizard downloads a pre-configured
controller.yaml from the Hub API, extracts key variables for subsequent
setup steps, and skips the interactive wizard entirely. Falls back to
manual wizard on failure.

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

CHANGELOG.md

@@ -1,5 +1,12 @@
 ## Changelog
 
+### What was just completed (2026-02-20 session 62)
+- **docker-setup.sh — Hub Config Download:**
+  - Added `--hub-customer` and `--hub-password` CLI flags for downloading pre-configured controller.yaml from Felhom Hub
+  - Added `HUB_URL` global variable (default: `https://hub.felhom.eu`)
+  - Hub download logic at start of `run_config_wizard()`: downloads YAML via `curl` with `X-Retrieval-Password` header, validates response, extracts key variables (domain, CF tokens, email), sets global variables for subsequent setup steps
+  - Falls back to interactive wizard if download fails or credentials not provided
+
 ### What was just completed (2026-02-20 session 61)
 - **v0.19.0 — Deployed App Removal + Missing Field Injection:**