Make the flavor configurable on the Docker build

Author: cristim

Dockerfile

@@ -1,4 +1,5 @@
 FROM golang:alpine as golang
+
 RUN apk add -U --no-cache ca-certificates git make
 
 COPY go.mod go.sum /src/
@@ -7,7 +8,9 @@ WORKDIR /src
 RUN GOPROXY=direct go mod download
 
 COPY . /src
-RUN FLAVOR=nightly CGO_ENABLED=0 GOPROXY=direct make
+
+ARG flavor=custom
+RUN FLAVOR="$flavor" CGO_ENABLED=0 GOPROXY=direct make
 
 FROM scratch
 COPY LICENSE BINARY_LICENSE THIRDPARTY /

Makefile

@@ -67,7 +67,7 @@ artifacts:                                       			 ## Create CloudFormation ar
 .PHONY: artifacts
 
 docker: 													 ##  Build a Docker image, currently only supports x86 hosts
-	docker build --platform=linux/amd64 --push -t $(DOCKER_IMAGE):$(DOCKER_IMAGE_VERSION) .
+	docker build --build-arg flavor=$(FLAVOR) --platform=linux/amd64 --push -t $(DOCKER_IMAGE):$(DOCKER_IMAGE_VERSION) .
 .PHONY: docker
 
 docker-login: