planning#494 Log deploy output to file

.gitlab-ci.yml

@@ -70,6 +70,10 @@ deploy:
   stage: deploy
   before_script: *gpg-setup
   script:
-    - ./mvnw $MAVEN_CLI_OPTS deploy -DskipTests
+    - ./mvnw $MAVEN_CLI_OPTS deploy -DskipTests -X 2>&1 | tee mvn.log
+  artifacts:
+    paths:
+      - mvn.log
+    when: always
   needs:
     - package