add 'images' documentation

deprecate 'imageTags' documentation

docs/kustomization.yaml

@@ -257,6 +257,40 @@ vars:
     fieldref:
       fieldpath: spec.template.spec.restartPolicy
 
+# Images modify the name, tags and/or digest for images without creating patches.
+# E.g. Given this kubernetes Deployment fragment:
+# ```
+#  containers:
+#    - name: mypostgresdb
+#      image: postgres:8
+#    - name: nginxapp
+#      image: nginx:1.7.9
+#    - name: myapp
+#      image: my-demo-app:latest
+#    - name: alpine-app
+#      image: alpine:3.7
+#```
+# one can change the `image` in the following ways:
+# 
+# - `postgres:8` to `my-registry/my-postgres:v1`,
+# - nginx tag `1.7.9` to `1.8.0`,
+# - image name `my-demo-app` to `my-app`,
+# - alpine's tag `3.7` to a digest value
+#
+# all with the following *kustomization*:
+
+images:
+  - name: postgres
+    newName: my-registry/my-postgres
+    newTag: v1
+  - name: nginx
+    newTag: 1.8.0
+  - name: my-demo-app
+    newName: my-app
+  - name: alpine
+    digest: sha256:24a0c4b4a4c0eb97a1aabb8e29f18e917d05abfe1b7a7c07857230879ce7d3d3
+
+# ImageTags is deprecated, instead use Image.
 # ImageTags modify the tags for images without creating patches.
 # E.g. Given this fragment of a Deployment:
 # ```