Ref #27090: add pull timings for docker backend

Author: LEDfan

src/main/java/eu/openanalytics/containerproxy/backend/docker/DockerEngineBackend.java

@@ -76,7 +76,9 @@ protected Container startContainer(ContainerSpec spec, Proxy proxy) throws Excep
 		if (imagePullPolicy == ImagePullPolicy.Always
 			|| (imagePullPolicy == ImagePullPolicy.IfNotPresent && !isImagePresent(spec))) {
 			logger.info("Pulling image {}", spec.getImage());
+			proxyStatusService.imagePulling(proxy, container);
 			pullImage(spec);
+			proxyStatusService.imagePulled(proxy, container);
 		}
 
 		Map<String, List<PortBinding>> portBindings = new HashMap<>();

src/main/java/eu/openanalytics/containerproxy/service/ProxyStatusService.java

@@ -65,6 +65,14 @@ public void containerScheduled(Proxy proxy, Container container, LocalDateTime s
     /**
      * Step 2.2: pull image
      */
+    public void imagePulling(Proxy proxy, Container container) {
+        startupLog.get(proxy.getId()).getPullImage(container.getIndex()).stepStarted();
+    }
+
+    public void imagePulled(Proxy proxy, Container container) {
+        startupLog.get(proxy.getId()).getPullImage(container.getIndex()).stepSucceeded();
+    }
+
     public void imagePulled(Proxy proxy, Container container, LocalDateTime pullingTime, LocalDateTime pulledTime) {
         startupLog.get(proxy.getId())
                 .getPullImage(container.getIndex())