## Description
According to the OTEL
([docs](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp#WithEndpoint)),
`WithEndpoint()` sets the target endpoint (host and port) the Exporter
will connect to. The provided endpoint should resemble
"example.com:4318" (no scheme or path). And it requires the endpoint to
be secure using `https://`.
To provide an insecure endpoint with `http://`, user will need to set
`OTEL_EXPORTER_OTLP_INSECURE=true`. This PR update the docs to reflect
this.
🛠️Fixes#1539
Updating docs to use the `--tools-file` flag over the now deprecated
`--tools_file`.
The new flag was added as of `v0.3.0` in #384
This change reduces confusion as current usage in docs results in
following message on startup of Toolbox server:
```sh
Flag --tools_file has been deprecated, please use --tools-file instead
```
Fixes#514
---------
Co-authored-by: Yuan <45984206+Yuan325@users.noreply.github.com>
