Update schema and documentation

docs/gossfile.md

@@ -173,8 +173,18 @@ command:
 
 `stdout` and `stderr` can be a string or [pattern](#patterns)
 
-The `exec` attribute is the command to run; this defaults to the name of
-the hash for backwards compatibility
+The `exec` attribute specifies the command to run. It can be:
+
+* A string, which will be executed through the shell (e.g., /bin/sh -c on Unix systems).
+* An array of strings, where each element represents an argument. In this case, the command is invoked directly without a shell. This is
+  particularly useful in environments like scratch containers, which do not include a shell.
+  ```yaml
+    ...
+    exec: ["/someBinary", "argument1"]
+    ...
+  ```
+
+If exec is not provided, it defaults to the name of the hash for backward compatibility.
 
 ### dns
 

docs/schema.yaml

@@ -34,7 +34,7 @@ definitions:
         default: 500
         examples:
           - 500
-          # optional attributes
+          # optional attributesf
       local-address:
         type: string
         default: 127.0.0.1
@@ -47,8 +47,12 @@ definitions:
         type: integer
         description: "Validates the exit-status and output of a command"
       exec:
-        description: "command to execute, defaults to the hash key"
-        type: string
+        description: "command to execute, defaults to the hash key, see https://goss.rocks/gossfile#command"
+        oneOf:
+          - type: string
+          - type: array
+            items:
+              type: string
       stdout:
         type: array
         description: "can be a string or pattern, see https://goss.rocks/gossfile#patterns"