[Bug] `pull_if_newer` function broken on the new Harbor API
**Describe the bug**
`pull_if_newer` method is broken (probably since the upgrade of our Harbor instance). This prevents nodes to pull the latest images. (The node did pull if no local image is present)

**To Reproduce**
1. Update a remote (algorithm/node) image, make sure you have an older version locally (but ofc. not the new one)
2. Start the node or algorithm
3. Check the version of the container that is used

**Expected behavior**
pull the image if the remote is newer

diff --git a/vantage6-common/vantage6/common/docker/addons.py b/vantage6-common/vantage6/common/docker/addons.py
index a7572528..7bb0271c 100644
--- a/vantage6-common/vantage6/common/docker/addons.py
+++ b/vantage6-common/vantage6/common/docker/addons.py
@@ -173,7 +173,7 @@ def inspect_remote_image_timestamp(docker_client, image: str, log=ClickLogger):
     if v1:
         timestamp = parse(result.json().get("created"))
     else:
-        timestamp = parse(result.json().get("extra_attrs").get("created"))
+        timestamp = parse(result.json().get("push_time"))
     return timestamp
 
 
diff --git a/vantage6/vantage6/cli/node.py b/vantage6/vantage6/cli/node.py
index 58d7f1ac..c58df6a9 100644
--- a/vantage6/vantage6/cli/node.py
+++ b/vantage6/vantage6/cli/node.py
@@ -354,8 +354,9 @@ def cli_node_start(name: str, config: str, environment: str,
         # docker_client.images.pull(image)
         pull_if_newer(docker.from_env(), image)
 
-    except Exception:
-        warning(' ... alas, no dice!')
+    except Exception as e:
+        warning(' ... Getting latest node image failed:')
+        warning(f"     {e}")
     else:
         info(" ... success!")
 
diff --git a/vantage6/vantage6/cli/server.py b/vantage6/vantage6/cli/server.py
index f1d43884..205939ef 100644
--- a/vantage6/vantage6/cli/server.py
+++ b/vantage6/vantage6/cli/server.py
@@ -192,8 +192,9 @@ def cli_server_start(ctx: Type[ServerContext], ip: str, port: int, image: str,
     try:
         pull_if_newer(docker.from_env(), image)
         # docker_client.images.pull(image)
-    except Exception:
-        warning("... alas, no dice!")
+    except Exception as e:
+        warning(' ... Getting latest node image failed:')
+        warning(f"     {e}")
     else:
         info(" ... success!")
 
@@ -493,8 +494,9 @@ def cli_server_import(ctx: Type[ServerContext], file_: str, drop_all: bool,
     info(f"Pulling latest server image '{image}'.")
     try:
         docker_client.images.pull(image)
-    except Exception:
-        warning("... alas, no dice!")
+    except Exception as e:
+        warning(' ... Getting latest node image failed:')
+        warning(f"     {e}")
     else:
         info(" ... success!")
 
['vantage6/vantage6/cli/server.py', 'vantage6-common/vantage6/common/docker/addons.py', 'vantage6/vantage6/cli/node.py']