Align env variables for OTLP ports

[mviitane]

Changes

Align env variables for OTLP ports. No functional changes, but just to avoid hard-coded OTLP ports to make it easier to read.

Merge Requirements

For new features contributions please make sure you have completed the following
essential items:

• CHANGELOG.md updated to document new feature additions
• Appropriate documentation updates in the docs
• Appropriate Helm chart updates in the helm-charts

Maintainers will not merge until the above have been completed. If you're unsure
which docs need to be changed ping the
@open-telemetry/demo-approvers.

[julianocosta89]

Hey @mviitane what do you think of creating 2 env vars:

• OTEL_COLLECTOR_HTTP_ENDPOINT
• OTEL_COLLECTOR_GRPC_ENDPOINT

I think that would make the compose file way more readable. WDYT?

[mviitane]

Hey @mviitane what do you think of creating 2 env vars:

• OTEL_COLLECTOR_HTTP_ENDPOINT
• OTEL_COLLECTOR_GRPC_ENDPOINT

I think that would make the compose file way more readable. WDYT?

Yes, this makes sense.

[mviitane]

Hey @mviitane what do you think of creating 2 env vars:

• OTEL_COLLECTOR_HTTP_ENDPOINT
• OTEL_COLLECTOR_GRPC_ENDPOINT

I think that would make the compose file way more readable. WDYT?

@julianocosta89, this change would be easier to do as a separate PR (after the current PRs) because also the Java PR uses these ports, to avoid merge conflicts.