Add MIT License and Docker build validation script

- Add MIT License with William Ballou as copyright holder
- Create scripts/validate_docker_build.sh for testing Docker builds independently
- Update documentation to reflect API-based secret configuration model
- Refactor sync.py to accept config via function parameters instead of env vars
- Update server.py to parse JSON payloads and validate required fields
- Improve security by removing secrets from environment variables

docker-compose.yml

@@ -7,19 +7,9 @@ services:
     expose:
       - "8080"
     volumes:
-      - ${WORKSPACE_VOLUME}:/workspace
+      - ${WINDMILL_DATA_PATH}/workspace:/workspace
     environment:
-      # Windmill connection
-      - WINDMILL_BASE_URL=http://windmill_server:8000
-      - WINDMILL_TOKEN=${WINDMILL_TOKEN}
-      - WINDMILL_WORKSPACE=${WINDMILL_WORKSPACE:-default}
-
-      # Git configuration
-      - GIT_REMOTE_URL=${GIT_REMOTE_URL}
-      - GIT_TOKEN=${GIT_TOKEN}
-      - GIT_BRANCH=${GIT_BRANCH:-main}
-      - GIT_USER_NAME=${GIT_USER_NAME:-Windmill Git Sync}
-      - GIT_USER_EMAIL=${GIT_USER_EMAIL:-windmill@example.com}
+      - WINDMILL_BASE_URL=${WINDMILL_BASE_URL:-http://windmill_server:8000}
     restart: unless-stopped
     depends_on:
       - windmill_server