[v2] Update versions in README (#6206)

## Which problem is this PR solving?
- README was referring to 1.59 version as example

## Description of the changes
- Update to refer to 2.0.0
- Clean-up

## How was this change tested?
- CI

---------

Signed-off-by: Yuri Shkuro <[email protected]>

cmd/jaeger/README.md

@@ -1,10 +1,8 @@
 # jaeger
 
-This is experimental Jaeger V2 based on OpenTelemetry collector.
+Jaeger V2 based on OpenTelemetry collector.
 Read the [blog post](https://medium.com/jaegertracing/towards-jaeger-v2-moar-opentelemetry-2f8239bee48e).
 
-Tracking issue: https://github.com/jaegertracing/jaeger/issues/4843.
-
 ```mermaid
 flowchart LR
     Receiver1 --> Processor
@@ -36,9 +34,10 @@ flowchart LR
 
 ## Try it out
 
-* Download `docker-compose-v2.yml` from https://github.com/jaegertracing/jaeger/blob/main/examples/hotrod/docker-compose-v2.yml
-* Optional: find the latest Jaeger version (see https://www.jaegertracing.io/download/) and pass it via environment variable `JAEGER_VERSION`. Otherwise `docker compose` will use the `latest` tag, which is fine for the first time you download the images, but once they are in your local registry the `latest` tag is never updated and you may be running stale (and possibly incompatible) verions of Jaeger and the HotROD app.
+* Download `docker-compose-v2.yml` from https://github.com/jaegertracing/jaeger/blob/main/examples/hotrod/docker-compose-v2.yml, e.g.:
+  * `curl -O https://raw.githubusercontent.com/jaegertracing/jaeger/refs/heads/main/examples/hotrod/docker-compose-v2.yml`
+* Optional: find the latest images versions (see https://www.jaegertracing.io/download/) and pass them via environment variables `JAEGER_VERSION` and `HOTROD_VERSION`. Otherwise `docker compose` will use the `latest` tag, which is fine for the first time you download the images, but once they are in your local registry the `latest` tag is never updated and you may be running stale (and possibly incompatible) verions of Jaeger and the HotROD app.
 * Run Jaeger backend and HotROD demo, e.g.:
-  * `JAEGER_VERSION=1.59 docker compose -f path-to-yml-file-v2 up`
+  * `JAEGER_VERSION=2.0.0 HOTROD_VERSION=1.63.0 docker compose -f docker-compose-v2.yml up`
 * Access Jaeger UI at http://localhost:16686 and HotROD app at http://localhost:8080
-* Shutdown / cleanup with `docker compose -f path-to-yml-file down`
+* Shutdown / cleanup with `docker compose -f docker-compose-v2.yml down`

examples/hotrod/docker-compose-v2.yml

@@ -1,5 +1,5 @@
 # To run a specific version of Jaeger, use environment variable, e.g.:
-#     JAEGER_VERSION=1.52 docker compose up
+#     JAEGER_VERSION=2.0.0 HOTROD_VERSION=1.63.0 docker compose up
 
 services:
   jaeger:
@@ -17,7 +17,7 @@ services:
       - jaeger-example
 
   hotrod:
-    image: ${REGISTRY:-}jaegertracing/example-hotrod:${JAEGER_VERSION:-latest}
+    image: ${REGISTRY:-}jaegertracing/example-hotrod:${HOTROD_VERSION:-latest}
     # To run the latest trunk build, find the tag at Docker Hub and use the line below
     # https://hub.docker.com/r/jaegertracing/example-hotrod-snapshot/tags
     #image: jaegertracing/example-hotrod-snapshot:0ab8f2fcb12ff0d10830c1ee3bb52b745522db6c

scripts/build-hotrod-image.sh

@@ -54,7 +54,7 @@ case "$jaeger_version" in
     binary="jaeger"
     ;;
   *)
-    echo "Invalid Jaeger version provided: $jaeger_version" 
+    echo "Invalid Jaeger version provided: $jaeger_version"
     print_help
     ;;
 esac
@@ -99,7 +99,10 @@ make build-${binary}
 bash scripts/build-upload-a-docker-image.sh -l -b -c "${binary}" -d cmd/"${binary}" -p "${current_platform}" -t release
 
 echo '::group:: docker compose'
-JAEGER_VERSION=$GITHUB_SHA REGISTRY="localhost:5000/" docker compose -f "$docker_compose_file" up -d
+JAEGER_VERSION=$GITHUB_SHA \
+  HOTROD_VERSION=$GITHUB_SHA \
+  REGISTRY="localhost:5000/" \
+  docker compose -f "$docker_compose_file" up -d
 echo '::endgroup::'
 
 i=0