docker-tag: add page (#9940)

pages/common/docker-tag.md

@@ -0,0 +1,16 @@
+# docker tag
+
+> Assign tags to existing Docker images.
+> More information: <https://docs.docker.com/engine/reference/commandline/tag/>.
+
+- Assign a name and tag to a specific image ID:
+
+`docker tag {{id}} {{name}}:{{tag}}`
+
+- Assign a tag to a specific image:
+
+`docker tag {{image}}:{{current_tag}} {{image}}:{{new_tag}}`
+
+- Display help:
+
+`docker tag`