fix dockerhub rate limit #519

.ci/drone/Dockerconfig-sample.json

@@ -0,0 +1,8 @@
+{
+  "auths": {
+    "https://index.docker.io/v1/": {
+      "auth": "REPLACE_USER_AND_TOKEN_BASE64"
+    }
+  }
+}
+

.ci/drone/Makefile

@@ -4,12 +4,22 @@
 help: ## show help
 	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sed -e 's/^GNUmakefile://' | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}'
 
+
+Dockerconfig.json: Makefile
+	@if [ -z "${DOCKERHUB_DRONE_USER}" ]; then echo need DOCKERHUB_DRONE_USER; exit 1; fi
+	@if [ -z "${DOCKERHUB_DRONE_TOKEN}" ]; then echo need DOCKERHUB_DRONE_TOKEN; exit 1; fi
+	echo -n '${DOCKERHUB_DRONE_USER}:${DOCKERHUB_DRONE_TOKEN}' | base64 \
+		| xargs -I {} sed -e "s/REPLACE_USER_AND_TOKEN_BASE64/{}/g" Dockerconfig-sample.json > Dockerconfig.json
+
 #
 # Add Secrets
 #  Dockerconfig.json : Dockerhub login auth
 #                      https://docs.drone.io/pipeline/docker/syntax/images/#pulling-private-images
 #
-setup: ## setup drone.io configuration
+setup: Dockerconfig.json ## setup drone.io configuration
+	drone secret update --repository srz-zumix/iutest \
+		--name dockerconfig \
+		--data @./Dockerconfig.json || \
 	drone secret add --repository srz-zumix/iutest \
 		--name dockerconfig \
 		--data @./Dockerconfig.json