docker: update dockerfile and make command

Dockerfile

@@ -6,13 +6,13 @@ ARG REPO=github.com/nspcc-dev/neofs-gw
 
 ENV GOGC off
 ENV CGO_ENABLED 0
-ENV LDFLAGS "-w -s -X ${REPO}/Version=${VERSION} -X ${REPO}/Build=${BUILD}"
+ENV LDFLAGS "-w -s -X main.Version=${VERSION}"
 
 WORKDIR /src
 
 COPY . /src
 
-RUN go build -v -mod=vendor -ldflags "${LDFLAGS}" -o /go/bin/neofs-gw ./
+RUN go build -v -mod=vendor -ldflags "${LDFLAGS} -X main.Build=$(date -u +%s%N)" -o /go/bin/neofs-gw ./
 
 # Executable image
 FROM scratch
@@ -21,3 +21,5 @@ WORKDIR /
 
 COPY --from=builder /go/bin/neofs-gw /bin/neofs-gw
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+
+ENTRYPOINT ["/bin/neofs-gw"]

Makefile

@@ -1,4 +1,3 @@
-REPO ?= $(shell go list -m)
 VERSION ?= "$(shell git describe --tags 2>/dev/null | sed 's/^v//')"
 
 HUB_IMAGE=nspccdev/neofs
@@ -23,7 +22,6 @@ deps:
 image: deps
 	@echo "${B}${G}⇒ Build GW docker-image ${R}"
 	@docker build \
-		--build-arg REPO=$(REPO) \
 		--build-arg VERSION=$(VERSION) \
 		 -f Dockerfile \
 		 -t $(HUB_IMAGE)-http-gate:$(VERSION) .