# API Configuration WEBPACK_API_URL=https://api.example.com WEBPACK_API_VERSION=v1 WEBPACK_API_TIMEOUT=5000 # Application Settings WEBPACK_APP_NAME=MyApp WEBPACK_APP_VERSION=1.0.0 WEBPACK_DEBUG=false # Variable expansion WEBPACK_BASE_URL=${WEBPACK_API_URL}/${WEBPACK_API_VERSION} WEBPACK_FULL_URL=${WEBPACK_BASE_URL}/users # Default value operator WEBPACK_PORT=${PORT:-3000} WEBPACK_HOST=${HOST:-localhost} # Private variables (not exposed without WEBPACK_ prefix) SECRET_KEY=super-secret-key DATABASE_URL=postgresql://localhost/my_db INTERNAL_TOKEN=internal-use-only