ci: increase artifact retention period (#869)

* ci: increase artifact retention period

polkadot/.gitlab-ci.yml

@@ -28,7 +28,7 @@ variables:
   artifacts:
     name:                          "${CI_JOB_NAME}_${CI_COMMIT_REF_NAME}"
     when:                          on_success
-    expire_in:                     7 days
+    expire_in:                     28 days
     paths:
       - artifacts/
 
@@ -253,15 +253,24 @@ publish-s3-release:
     BUCKET:                        "releases.parity.io"
     PREFIX:                        "polkadot/${ARCH}-${DOCKER_OS}"
   script:
-    - echo "uploading objects to ${BUCKET}/${PREFIX}/${VERSION}"
+    - echo "uploading objects to https://${BUCKET}/${PREFIX}/${VERSION}"
     - aws s3 sync ./artifacts/ s3://${BUCKET}/${PREFIX}/${VERSION}/
-    - echo "update objects at ${BUCKET}/${PREFIX}/${EXTRATAG}/${name}"
+    - echo "update objects at https://${BUCKET}/${PREFIX}/${EXTRATAG}"
     - for file in ./artifacts/*; do
       name="$(basename ${file})";
       aws s3api copy-object
         --copy-source ${BUCKET}/${PREFIX}/${VERSION}/${name}
         --bucket ${BUCKET} --key ${PREFIX}/${EXTRATAG}/${name};
       done
+    - |
+      cat <<-EOM
+      |
+      |  polkadot binary paths: 
+      |
+      |  - https://${BUCKET}/${PREFIX}/${EXTRATAG}/polkadot
+      |  - https://${BUCKET}/${PREFIX}/${VERSION}/polkadot
+      |
+      EOM
   after_script:
     - aws s3 ls s3://${BUCKET}/${PREFIX}/${EXTRATAG}/
         --recursive --human-readable --summarize