make provider.type attribut required

Signed-off-by: Guillaume Lours <705411+glours@users.noreply.github.com>

Author: glours

loader/loader_test.go

@@ -3791,6 +3791,19 @@ services:
 			"booleans": []string{"true", "false"},
 		},
 	})
+
+	_, err = loadYAML(`
+name: service-provider
+services:
+  test:
+    provider:
+      options:
+        bar: zot
+        strings: foo
+        numbers: 12
+        booleans: true
+`)
+	assert.Check(t, strings.Contains(err.Error(), "services.test.provider type is required"))
 }
 
 func TestImageVolume(t *testing.T) {

schema/compose-spec.json

@@ -392,6 +392,7 @@
         "provider": {
           "type": "object",
           "description": "Specify a service which will not be manage by Compose directly, and delegate its management to an external provider.",
+          "required": ["type"],
           "properties": {
             "type": {
               "type": "string",