next.js

1e47bc23 - Finish up otel example with working docker and small guide in readme (#46819)

Finish up otel example with working docker and small guide in readme (#46819) Finish up OTEL example with HTTP (we don't recommend grpc because that package is needlessly large). Also added a link to a simple repo with otel collector and few backends: https://github.com/vercel/opentelemetry-collector-dev-setup --------- Co-authored-by: Tim Neutkens <tim@timneutkens.nl>