Added build-image target in Makefile

Author: bsrinivas8687

.dockerignore

@@ -1,2 +1,5 @@
 /.idea/
 /.github/
+/CODE_OF_CONDUCT.md
+/bin/
+/build/

.gitignore

@@ -1,4 +1,5 @@
 .DS_Store*
 /.idea/
 /bin/
-/vendor/
+/build/
+/vendor/

Makefile

@@ -16,13 +16,17 @@ benchmark:
 
 .PHONY: clean
 clean:
-	rm -rf ./build
+	rm -rf ./bin ./build ./vendor
 
 .PHONY: install
 install:
 	go build -mod=readonly -tags="${BUILD_TAGS}" -ldflags="${LD_FLAGS}" \
 		-o ${GOPATH}/bin/sentinelnode main.go
 
+.PHONY: build-image
+build-image:
+	@docker build --compress --file Dockerfile --force-rm --no-cache --tag sentinel-dvpn-node .
+
 .PHONY: go-lint
 go-lint:
 	@golangci-lint run --fix