Added git tag and docker build versioning support

.release

@@ -0,0 +1 @@
+release=1.0.0

Makefile

@@ -0,0 +1,51 @@
+IMAGE_REPO=infracloud/botkube
+TAG=$(shell cut -d'=' -f2- .release)
+
+.DEFAULT_GOAL := release
+.PHONY: release git-tag check-git-status build pre-build tag-image publish
+
+#Docker Tasks
+#Make a release
+release: git-tag build tag-image publish 
+	@echo "Successfully released version $(TAG)"
+
+#Create a git tag
+git-tag: check-git-status
+	@echo "Creating a git tag"
+	@git add .
+	@git commit -m "Bumped to version $(TAG)" ;
+	@git tag $(TAG) ;
+	@git push --tags ;
+	@echo 'Git tag pushed successfully' ;
+
+#Check git status
+check-git-status:
+	@echo "Checking git status"
+	@if [ -n "$(shell git tag | grep $(TAG))" ] ; then echo 'Tag already exists' && exit 1 ; fi
+	@if [ -z "$(shell git remote -v)" ] ; then echo 'No remote to push tags to' && exit 1 ; fi
+	@if [ -z "$(shell git config user.email)" ] ; then echo 'Unable to detect git credentials' && exit 1 ; fi
+
+#Build the image
+build: pre-build 
+	@echo "Building docker image"
+	@docker build --build-arg GOOS_VAL=$(shell go env GOOS) --build-arg GOARCH_VAL=$(shell go env GOARCH) -t $(IMAGE_REPO) -f build/Dockerfile --no-cache .
+	@echo "Docker image build successfully"
+
+#Pre-build checks
+pre-build:
+	@echo "Checking system information"
+	@if [ -z "$(shell go env GOOS)" ] || [ -z "$(shell go env GOARCH)" ] ; then echo 'Could not determine the system architecture.' && exit 1 ; fi
+
+
+#Tag images
+tag-image: 
+	@echo 'Tagging image'
+	@docker tag $(IMAGE_REPO) $(IMAGE_REPO):$(TAG)
+	@docker tag $(IMAGE_REPO) $(IMAGE_REPO):latest
+
+#Docker push image
+publish:
+	@echo "Pushing docker image to repository"
+	@docker login
+	@docker push $(IMAGE_REPO):$(TAG)
+	@docker push $(IMAGE_REPO):latest	

helm/botkube/values.yaml

@@ -6,7 +6,7 @@ replicaCount: 1
 
 image:
   repository: infracloud/botkube
-  tag: "0.4"
+  tag: "latest" 
   pullPolicy: Always
 
 nameOverride: ""