feat: wizard config volume integration

- entrypoint.sh: wait for config file before starting uvicorn
- config.py: resolve DB URL from wizard config volume
- init_wizard.py: read config from file instead of HTTP
- Dockerfile: use entrypoint.sh

app/core/config.py

@@ -1,3 +1,5 @@
+import os
+import json
 from sqlalchemy import create_engine
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import sessionmaker
@@ -5,6 +7,30 @@ from pydantic_settings import BaseSettings
 from typing import Optional
 
 
+def _resolve_db_url(env_url: str) -> str:
+    """Read DB config from wizard config volume if available, else use env."""
+    config_dir = os.getenv("CONFIG_DIR", "/config")
+    config_file = os.getenv("CONFIG_FILE", "harborforge.json")
+    config_path = os.path.join(config_dir, config_file)
+
+    if os.path.exists(config_path):
+        try:
+            with open(config_path, "r") as f:
+                cfg = json.load(f)
+            db_cfg = cfg.get("database")
+            if db_cfg:
+                host = db_cfg.get("host", "mysql")
+                port = db_cfg.get("port", 3306)
+                user = db_cfg.get("user", "harborforge")
+                password = db_cfg.get("password", "harborforge_pass")
+                database = db_cfg.get("database", "harborforge")
+                return f"mysql+pymysql://{user}:{password}@{host}:{port}/{database}"
+        except Exception:
+            pass
+
+    return env_url
+
+
 class Settings(BaseSettings):
     DATABASE_URL: str = "mysql+pymysql://harborforge:harborforge_pass@mysql:3306/harborforge"
     SECRET_KEY: str = "change-me-in-production"
@@ -18,7 +44,9 @@ class Settings(BaseSettings):
 
 settings = Settings()
 
-engine = create_engine(settings.DATABASE_URL, pool_pre_ping=True)
+# Resolve DB URL: wizard config volume > env > default
+_db_url = _resolve_db_url(settings.DATABASE_URL)
+engine = create_engine(_db_url, pool_pre_ping=True)
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
 Base = declarative_base()