$ npm install
$ node ./main.js
@opentelemetry/instrumentation-express Module express has been loaded before @opentelemetry/instrumentation-express so it might not work, please initialize it before requiring express
@opentelemetry/instrumentation-pino Module pino has been loaded before @opentelemetry/instrumentation-pino so it might not work, please initialize it before requiring pino
OTEL_TRACES_EXPORTER is empty. Using default otlp exporter.