Support local compilation

Author: pleshakov

.gitignore

@@ -16,3 +16,6 @@
 
 # GoLand IDE
 .idea
+
+# Binary
+gateway

Makefile

@@ -5,11 +5,21 @@ PREFIX = nginx-gateway
 GIT_COMMIT = $(shell git rev-parse HEAD)
 DATE = $(shell date -u +"%Y-%m-%dT%H:%M:%SZ")
 
+TARGET ?= local
+
 KIND_KUBE_CONFIG_FOLDER = $${HOME}/.kube/kind
 
+export DOCKER_BUILDKIT = 1
+
 .PHONY: container
-container:
-	docker build --build-arg VERSION=$(VERSION) --build-arg GIT_COMMIT=$(GIT_COMMIT) --build-arg DATE=$(DATE) --target container -f build/Dockerfile -t $(PREFIX):$(TAG) .
+container: build
+	docker build --build-arg VERSION=$(VERSION) --build-arg GIT_COMMIT=$(GIT_COMMIT) --build-arg DATE=$(DATE) --target $(TARGET) -f build/Dockerfile -t $(PREFIX):$(TAG) .
+
+.PHONY: build
+build:
+ifeq (${TARGET},local)
+	CGO_ENABLED=0 GOOS=linux go build -trimpath -a -ldflags "-s -w -X main.version=${VERSION} -X main.commit=${GIT_COMMIT} -X main.date=${DATE}" -o gateway github.com/nginxinc/nginx-gateway-kubernetes/cmd/gateway
+endif
 
 .PHONY: deps
 deps:

build/Dockerfile

@@ -11,7 +11,12 @@ RUN go mod download
 COPY cmd /go/src/github.com/nginxinc/nginx-gateway-kubernetes/cmd
 RUN CGO_ENABLED=0 GOOS=linux go build -trimpath -a -ldflags "-s -w -X main.version=${VERSION} -X main.commit=${GIT_COMMIT} -X main.date=${DATE}" -o gateway .
 
-FROM scratch as container
-COPY --from=builder /go/src/github.com/nginxinc/nginx-gateway-kubernetes/cmd/gateway/gateway /usr/bin/
+FROM scratch as common
 USER 1001:1001
-ENTRYPOINT [ "/usr/bin/gateway" ]
+ENTRYPOINT [ "/usr/bin/gateway" ]
+
+FROM common as container
+COPY --from=builder /go/src/github.com/nginxinc/nginx-gateway-kubernetes/cmd/gateway/gateway /usr/bin/
+
+FROM common as local
+COPY ./gateway /usr/bin/