Fix update checks

Container started by docker compose does not have image checksum,
inspect image directly. Should work most of the time unless user
manually pull the up-to-date image without updating the deployment

pipeline/init_pipeline.py

@@ -13,8 +13,16 @@
 def get_image_info():
     client = docker.APIClient(base_url='unix://var/run/docker.sock')
     container_id = socket.gethostname()
-    info = client.inspect_container(container=container_id)
-    return info['Config']['Image'].split("@")
+    container_info = client.inspect_container(container=container_id)
+    image_info = container_info['Image'].split("@")
+    if len(image_info) == 2:
+        return image_info
+    elif len(image_info) == 1:
+        image_data = client.inspect_image(image=image_info[0])
+        image_sha256 = image_data['RepoDigests'][0].split("@")[1]
+        if len(image_info) == 2:
+            return image_info[0], image_sha256
+    return None
 
 
 def parse_metadata():
@@ -98,7 +106,7 @@ def parse_metadata():
 
     image_info = get_image_info()
 
-    if len(image_info) == 2:
+    if image_info and len(image_info) == 2:
         Variable.set("image_info",
                             {
                                 "name": image_info[0],