feat: allow 0 containers

Signed-off-by: Ben Meier <[email protected]>

score-v1b1.json

@@ -67,7 +67,7 @@
     "containers": {
       "description": "The set of named containers in the Workload. The container name must be a valid RFC1123 Label Name of up to 63 characters, including a-z, 0-9, '-' but may not start or end with '-'.",
       "type": "object",
-      "minProperties": 1,
+      "minProperties": 0,
       "additionalProperties": {
         "$ref": "#/$defs/container"
       },