feat: improve CI/CD and make config environment-aware

CI/CD Improvements (.woodpecker.yml):
- Add build_args for VERSION, BUILD_DATE, PYTHON_VERSION, NODE_VERSION
- Add OCI labels for better image metadata
- Enable cache_from for faster builds
- Enable provenance for supply chain security

Configuration Improvements (rxconfig.py):
- Make API_URL configurable via environment (was hardcoded localhost)
- Make ports configurable via FRONTEND_PORT, BACKEND_PORT env vars
- Make DATABASE_URL configurable via environment
- Support both development (SQLite) and production (PostgreSQL) setups

Benefits:
- Better CI cache utilization
- Proper image versioning and metadata
- Easier deployment to different environments
- No code changes needed for prod vs dev

rxconfig.py

@@ -3,14 +3,21 @@
 This file configures the Reflex application settings.
 """
 
+import os
 import reflex as rx
 
+# Environment-aware configuration
+API_URL = os.getenv("API_URL", "http://localhost:8000")
+FRONTEND_PORT = int(os.getenv("FRONTEND_PORT", "3000"))
+BACKEND_PORT = int(os.getenv("BACKEND_PORT", "8000"))
+DB_URL = os.getenv("DATABASE_URL", "sqlite:///reflex.db")
+
 config = rx.Config(
     app_name="peikarband",
-    api_url="http://localhost:8000",
-    frontend_port=3000,
-    backend_port=8000,
-    db_url="sqlite:///reflex.db",  # Temporary, will use PostgreSQL
+    api_url=API_URL,
+    frontend_port=FRONTEND_PORT,
+    backend_port=BACKEND_PORT,
+    db_url=DB_URL,
     disable_plugins=["reflex.plugins.sitemap.SitemapPlugin"],
     stylesheets=[
         "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap",