Adding Makefile target for worker image creation (kubernetes-sigs#532) (kubernetes-sigs#728)

1) add target for worker image creation
2) add worker exe to .gitignore
3) update skipper configuration

Author: yevgeny-shnaidman

.gitignore

@@ -1,6 +1,7 @@
 # Operator's binaries
 /manager
 /manager-hub
+/worker
 
 # Binaries for programs and plugins
 *.exe

Makefile

@@ -360,4 +360,8 @@ catalog-push: ## Push a catalog image.
 signimage-build: ## Build docker image with the signer.
 	docker build -f Dockerfile.signimage -t $(SIGNER_IMG) .
 
+.PHONY: workerimage-build 
+workerimage-build: ## Build docker image for worker app.
+	docker build -f Dockerfile.worker -t $(WORKER_IMG) .
+
 include docs.mk

skipper.env

@@ -13,5 +13,6 @@ KUBECONFIG
 VERSION
 REPO
 IMG
+WORKER_IMG
 TEST
 SIGNER_IMG