feat: Runtime configuration and Docker deployment improvements

Frontend:
- Add runtime configuration service for deployment-time API URL injection
- Create docker-entrypoint.sh to generate config.json from environment variables
- Update ApiService, ApprovalService, and DocumentViewer to use RuntimeConfigService
- Add APP_INITIALIZER to load runtime config before app starts

Backend:
- Fix init-blockchain.js to properly quote mnemonic phrases in .env file
- Improve docker-entrypoint.sh with health checks and better error handling

Docker:
- Add API_BASE_URL environment variable to frontend container
- Update docker-compose.yml with clear documentation for remote deployment
- Reorganize .env.example with clear categories (REQUIRED FOR REMOTE, PRODUCTION, AUTO-GENERATED)

Workflow fixes:
- Fix DepartmentApproval interface to match backend schema
- Fix stage transformation for 0-indexed stageOrder
- Fix workflow list to show correct stage count from definition.stages

Cleanup:
- Move development artifacts to .trash directory
- Remove root-level package.json (was only for utility scripts)
- Add .trash/ to .gitignore

frontend/docker-entrypoint.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+# ==============================================================================
+# Goa GEL Frontend - Docker Entrypoint
+# ==============================================================================
+# Injects runtime configuration from environment variables
+# ==============================================================================
+
+set -e
+
+# Configuration directory in nginx html root
+CONFIG_DIR="/usr/share/nginx/html/assets"
+CONFIG_FILE="${CONFIG_DIR}/config.json"
+
+# Default values (same as build-time defaults)
+API_BASE_URL="${API_BASE_URL:-http://localhost:3001/api/v1}"
+
+echo "=== Goa GEL Frontend Runtime Configuration ==="
+echo "API_BASE_URL: ${API_BASE_URL}"
+echo "=============================================="
+
+# Ensure config directory exists
+mkdir -p "${CONFIG_DIR}"
+
+# Generate runtime configuration JSON
+cat > "${CONFIG_FILE}" << EOF
+{
+  "apiBaseUrl": "${API_BASE_URL}"
+}
+EOF
+
+echo "Runtime config written to ${CONFIG_FILE}"
+
+# Execute the main command (nginx)
+exec "$@"