Added docker build and download of agents

Dockerfile

@@ -0,0 +1,23 @@
+FROM maven:3.9.7-eclipse-temurin-21-alpine as build
+
+WORKDIR /build
+
+# Copy the local code to the container
+COPY . .
+
+# Build /build/target/cpu-burner.jar
+RUN ./mvnw package
+
+# Download /build/elastic-otel-javaagent.jar
+ARG ELASTIC_OTEL_JAVAAGENT_VERSION=0.3.2
+RUN wget --tries=5 -qO- https://repo1.maven.org/maven2/co/elastic/otel/elastic-otel-javaagent/${ELASTIC_OTEL_JAVAAGENT_VERSION}/elastic-otel-javaagent-${ELASTIC_OTEL_JAVAAGENT_VERSION}.jar > ./elastic-otel-javaagent.jar
+
+FROM eclipse-temurin:21-jre-ubi9-minimal
+
+COPY --from=build /build/target/cpu-burner.jar /
+COPY --from=build /build/elastic-otel-javaagent.jar /
+
+ENV OTEL_SERVICE_NAME=cpu-burner-otel
+ENV ELASTIC_OTEL_UNIVERSAL_PROFILING_INTEGRATION_ENABLED=true
+
+CMD ["java","-javaagent:./elastic-otel-javaagent.jar", "-jar", "./cpu-burner.jar"]

README.MD

@@ -1,24 +1,36 @@
 This project is a CPU-bound demo application for showcasing the elastic profiling capabilities.
 
-To build, run `./mvnw package`.
+To build the application, run `./mvnw package`.
 
-Running with the [Elastic OpenTelemetry distribution](https://github.com/elastic/elastic-otel-java):
+Running with the latest [Elastic OpenTelemetry distribution](https://github.com/elastic/elastic-otel-java):
 ```
-java -javaagent:./elastic-otel-javaagent-<version>.jar \
+curl -o 'elastic-otel-javaagent.jar' -L 'https://oss.sonatype.org/service/local/artifact/maven/redirect?r=releases&g=co.elastic.otel&a=elastic-otel-javaagent&v=LATEST'
+java -javaagent:./elastic-otel-javaagent.jar \
 -Dotel.exporter.otlp.endpoint=<elastic-cloud-OTLP-endpoint> \
 "-Dotel.exporter.otlp.headers=Authorization=Bearer XXXX" \
 -Dotel.service.name=cpu-burner-otel \
 -Delastic.otel.universal.profiling.integration.enabled=true \
 -jar ./target/cpu-burner.jar
 ```
 
-Running with the [classic Elastic APM Agent](https://github.com/elastic/apm-agent-java):
+Running with the latest [classic Elastic APM Agent](https://github.com/elastic/apm-agent-java):
 ```
-java -javaagent:elastic-apm-agent-<version>.jar \
+curl -o 'elastic-apm-agent.jar' -L 'https://oss.sonatype.org/service/local/artifact/maven/redirect?r=releases&g=co.elastic.apm&a=elastic-apm-agent&v=LATEST'
+java -javaagent:elastic-apm-agent.jar \
 -Delastic.apm.service_name=cpu-burner-elastic \
 -Delastic.apm.secret_token=XXXXX \
--Delastic.apm.server_url=<elastic-apm-server-enndpoint> \
+-Delastic.apm.server_url=<elastic-apm-server-endpoint> \
 -Delastic.apm.application_packages=co.elastic.demo \
 -Delastic.apm.universal_profiling_integration_enabled=true \
 -jar ./target/cpu-burner.jar
-```
+```
+
+Note that at the time of writing, universal profiling is only supported on Linux.
+On macOS, you can use [colima](https://github.com/abiosoft/colima) and docker containers to avoid having to setup a full Linux VM yourself.
+
+Use the following commands to build and run the cpu-burner app in Docker with the OpenTelemetry agent:
+```
+docker build -t cpu-burner .
+docker run --rm -e OTEL_EXPORTER_OTLP_ENDPOINT=<elastic-cloud-OTLP-endpoint> -e OTEL_EXPORTER_OTLP_HEADERS="Authorization=Bearer XXXX" cpu-burner
+```
+