FROM maven:3.9-eclipse-temurin-17 AS build
WORKDIR /app
COPY pom.xml .
RUN mvn dependency:go-offline -B
COPY src ./src
RUN mvn package -DskipTests -B
RUN curl -L -o opentelemetry-javaagent.jar https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/latest/download/opentelemetry-javaagent.jar

FROM eclipse-temurin:17-jre-alpine

# Best practice: run as a non-root user
RUN addgroup -S spring && adduser -S spring -G spring
USER spring:spring

WORKDIR /app
COPY --from=build /app/target/app.jar app.jar
COPY --from=build /app/opentelemetry-javaagent.jar opentelemetry-javaagent.jar
EXPOSE 8080
ENTRYPOINT ["java", "-javaagent:opentelemetry-javaagent.jar", "-jar", "app.jar"]