a better tagging strategy

.github/main.workflow

@@ -3,25 +3,31 @@ workflow "New workflow" {
   resolves = ["push"]
 }
 
+action "master" {
+  uses = "actions/bin/filter@master"
+  args = "branch master"
+}
+
 action "Docker Registry" {
+  needs = ["master"]
   uses = "actions/docker/login@86ff551d26008267bb89ac11198ba7f1d807b699"
   secrets = ["DOCKER_USERNAME", "DOCKER_PASSWORD", "DOCKER_REGISTRY_URL"]
 }
 
 action "build" {
-  uses = "actions/docker/cli@master"
   needs = ["Docker Registry"]
-  args = "build -t docker.pkg.github.com/kubernetes-sigs/cluster-api-provider-docker/manager:latest ."
+  uses = "actions/docker/cli@master"
+  args = "build -t base ."
 }
 
-action "master" {
+action "tag" {
   needs = ["build"]
-  uses = "actions/bin/filter@master"
-  args = "branch master"
+  uses = "actions/docker/tag@master"
+  args = "base docker.pkg.github.com/kubernetes-sigs/cluster-api-provider-docker/manager"
 }
 
 action "push" {
+  needs = ["tag"]
   uses = "actions/docker/cli@master"
-  needs = ["master"]
-  args = "push docker.pkg.github.com/kubernetes-sigs/cluster-api-provider-docker/manager:latest"
+  args = "push docker.pkg.github.com/kubernetes-sigs/cluster-api-provider-docker/manager"
 }