fix: add push docker readme

.drone.yml

@@ -39,6 +39,20 @@ steps:
     branch:
     - master
 
+- name: push-readme
+  image: docker.io/volkerraschek/build-image:latest
+  commands:
+  - make push/README
+  environment:
+    CONTAINER_IMAGE_REGISTRY_PASSWORD:
+      from_secret: container_image_registry_password
+  volumes:
+  - name: docker_socket
+    path: /var/run/docker.sock
+  when:
+    branch:
+    - master
+
 - name: notify
   image: drillster/drone-email
   environment:

Makefile

@@ -51,6 +51,13 @@ container-image/push:
 	echo ${CONTAINER_IMAGE_REGISTRY_PASSWORD} | ${CONTAINER_RUNTIME} login ${CONTAINER_IMAGE_REGISTRY_NAME} --username ${CONTAINER_IMAGE_REGISTRY_USER} --password-stdin
 	${CONTAINER_RUNTIME} push ${CONTAINER_IMAGE_FULL}
 
+# PUSH README
+# ==============================================================================
+PHONY+=push/README
+push/README:
+	echo ${CONTAINER_IMAGE_REGISTRY_PASSWORD} | ${CONTAINER_RUNTIME} login ${CONTAINER_IMAGE_REGISTRY_NAME} --username ${CONTAINER_IMAGE_REGISTRY_USER} --password-stdin
+	docker pushrm ${CONTAINER_IMAGE_FULL}
+
 # PHONY
 # ==============================================================================
 # Declare the contents of the PHONY variable as phony.  We keep that information