fix: Load .env file in docker-deploy.sh before checking variables

- Add environment variable loading from .env file in main() function
- Use set -o allexport to export all variables from .env
- Load variables before check_env_vars() is called
- Fixes "Missing required environment variables" error

This ensures the deployment script can access all environment variables
from the .env file before validating they exist.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

scripts/docker-deploy.sh

@@ -139,6 +139,15 @@ cleanup() {
 main() {
     echo -e "${GREEN}Starting deployment process...${NC}"
     
+    # Load environment variables from .env file
+    if [ -f ".env" ]; then
+        echo -e "${BLUE}📄 Loading environment variables from .env file...${NC}"
+        set -o allexport
+        source .env
+        set +o allexport
+        echo -e "${GREEN}✅ Environment variables loaded${NC}"
+    fi
+    
     # Pre-deployment checks
     check_env_file
     check_env_vars