adding missed backslash

devops/core-plus/build/Dockerfile

@@ -6,6 +6,6 @@ ENV PORT $PORT
 EXPOSE ${PORT}
 
 # Copy the jar to the production image from the builder stage.
-COPY partition-core-plus/target/partition-core-plus-*-spring-boot.jar partition-core-plus.jar
+COPY partition-core-plus/target/partition-core-plus-*-spring-boot.jar /partition-core-plus.jar
 
 ENTRYPOINT ["java","-jar","/partition-core-plus.jar"]