add OpenTelemetry

Signed-off-by: Peter Siegmund <developer@mars3142.org>

Dockerfile

@@ -14,6 +14,8 @@ COPY --chown=app ./gradle/ ./gradle
 COPY --chown=app ./gradlew ./build.gradle ./settings.gradle ./app.json ./
 COPY --chown=app ./src ./src
 
+RUN curl -OL https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/latest/download/opentelemetry-javaagent.jar
+
 # Build the production package
 RUN ./gradlew clean build -x test
 
@@ -24,6 +26,11 @@ RUN useradd -m app
 USER app
 
 COPY --chown=app --from=build /usr/src/app/build/libs/*-SNAPSHOT.jar /usr/app/config.jar
+COPY --chown=app --from=build /usr/src/app/opentelemetry-javaagent.jar /usr/app/opentelemetry-javaagent.jar
+
+ENV JAVA_TOOL_OPTIONS="-javaagent:/usr/app/opentelemetry-javaagent.jar"
+ENV OTEL_SERVICE_NAME="config-service"
+ENV OTEL_EXPORTER_OTLP_ENDPOINT="http://opentelemetry-collector.web:4318"
 
 HEALTHCHECK CMD curl --fail http://localhost:5000/actuator/health || exit 1