Update dockerfile for adservice to use different base images (#705)

CHANGELOG.md

@@ -204,3 +204,5 @@ significant modifications will be credited to OpenTelemetry Authors.
 ([#702](https://github.com/open-telemetry/opentelemetry-demo/pull/702))
 * Update emailservice Dockerfile to use alpine and multistage build
 ([#703](https://github.com/open-telemetry/opentelemetry-demo/pull/703))
+* Update dockerfile for adservice to use different base images
+([#705](https://github.com/open-telemetry/opentelemetry-demo/pull/705))

src/adservice/Dockerfile

@@ -16,22 +16,27 @@ FROM eclipse-temurin:17-jdk AS builder
 
 WORKDIR /usr/src/app/
 
+COPY ./src/adservice/gradlew* ./src/adservice/settings.gradle* ./src/adservice/build.gradle .
+COPY ./src/adservice/gradle ./gradle
+
+RUN ./gradlew
+RUN ./gradlew downloadRepos
+
 COPY ./src/adservice/ ./
 COPY ./pb/ ./proto
-RUN ./gradlew downloadRepos
 RUN ./gradlew installDist -PprotoSourceDir=./proto
 
 # -----------------------------------------------------------------------------
 
-FROM eclipse-temurin:17-jdk
+FROM eclipse-temurin:17-jre
 
 ARG version=1.19.1
 WORKDIR /usr/src/app/
 
 COPY --from=builder /usr/src/app/ ./
-ADD https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/download/v$version/opentelemetry-javaagent.jar /app/opentelemetry-javaagent.jar
-RUN chmod 644 /app/opentelemetry-javaagent.jar
-ENV JAVA_TOOL_OPTIONS=-javaagent:/app/opentelemetry-javaagent.jar
+ADD https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/download/v$version/opentelemetry-javaagent.jar /usr/src/app/opentelemetry-javaagent.jar
+RUN chmod 644 /usr/src/app/opentelemetry-javaagent.jar
+ENV JAVA_TOOL_OPTIONS=-javaagent:/usr/src/app/opentelemetry-javaagent.jar
 
 EXPOSE ${AD_SERVICE_PORT}
 ENTRYPOINT [ "./build/install/hipstershop/bin/AdService" ]