Refactoring Makefile

- add `help.mk`
- add target to build and publish image
- update README

Signed-off-by: Evgeniy Kulikov <kim@nspcc.ru>

Makefile

@@ -1,17 +1,12 @@
+-include .env
+-include help.mk
+
+HUB_IMAGE=nspccdev/neofs
+
 VERSION ?= "$(shell git describe --tags 2>/dev/null || git rev-parse --short HEAD | sed 's/^v//')"
 BUILD_VERSION ?= "$(shell git describe --abbrev=0 --tags | sed 's/^v//')"
 
-.PHONY: help format deps
-
-# Show this help prompt
-help:
-	@echo '  Usage:'
-	@echo ''
-	@echo '    make <target>'
-	@echo ''
-	@echo '  Targets:'
-	@echo ''
-	@awk '/^#/{ comment = substr($$0,3) } comment && /^[a-zA-Z][a-zA-Z0-9_-]+ ?:/{ print "   ", $$1, comment }' $(MAKEFILE_LIST) | column -t -s ':' | grep -v 'IGNORE' | sort | uniq
+.PHONY: format deps image publish
 
 # Show current version
 version:
@@ -25,7 +20,7 @@ format:
 		goimports -w $$f; \
 	done
 
-# Make sure that all files added to commit
+# Check and ensure dependencies
 deps:
 	@printf "⇒ Ensure vendor: "
 	@go mod tidy -v && echo OK || (echo fail && exit 2)
@@ -35,9 +30,14 @@ deps:
 	@go mod vendor && echo OK || (echo fail && exit 2)
 
 # Build current docker image
-image-build: deps
+image: deps
 	@echo "⇒ Build docker-image"
 	@docker build \
 		--build-arg VERSION=$(BUILD_VERSION) \
 		 -f Dockerfile \
-		 -t nspccdev/neofs-s3-gate:$(BUILD_VERSION) .
+		 -t $(HUB_IMAGE)-s3-gate:$(BUILD_VERSION) .
+
+# Publish docker image
+publish:
+	@echo "${B}${G}⇒ publish docker image ${R}"
+	@docker push $(HUB_IMAGE)-s3-gate:$(VERSION)

README.md

@@ -1,5 +1,24 @@
 # NeoFS S3 Gate
 
+S3Gate provides API compatible with Amazon S3 cloud storage service.
+
+## Notable make targets
+
+```
+  Usage:
+
+    make <target>
+
+  Targets:
+
+    deps      Check and ensure dependencies
+    format    Reformat code
+    help      Show this help prompt
+    image     Build current docker image
+    publish   Publish docker image
+    version   Show current version
+```
+
 ## Example of configuration
 
 ```

go.sum

@@ -45,8 +45,6 @@ github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj
 github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a/go.mod h1:DAHtR1m6lCRdSC2Tm3DSWRPvIPr6xNKyeHdqDQSQT+A=
 github.com/aws/aws-lambda-go v1.13.3/go.mod h1:4UKl9IzQMoD+QF79YdCuzCwp8VbmG4VAQwij/eHl5CU=
 github.com/aws/aws-sdk-go v1.27.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
-github.com/aws/aws-sdk-go v1.36.28 h1:JVRN7BZgwQ31SQCBwG5QM445+ynJU0ruKu+miFIijYY=
-github.com/aws/aws-sdk-go v1.36.28/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
 github.com/aws/aws-sdk-go v1.37.1 h1:BTHmuN+gzhxkvU9sac2tZvaY0gV9ihbHw+KxZOecYvY=
 github.com/aws/aws-sdk-go v1.37.1/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
 github.com/aws/aws-sdk-go-v2 v0.18.0/go.mod h1:JWVYvqSMppoMJC0x5wdwiImzgXTI9FuZwxzkQq9wy+g=

help.mk

@@ -0,0 +1,11 @@
+.PHONY: help
+
+# Show this help prompt
+help:
+	@echo '  Usage:'
+	@echo ''
+	@echo '    make <target>'
+	@echo ''
+	@echo '  Targets:'
+	@echo ''
+	@awk '/^#/{ comment = substr($$0,3) } comment && /^[a-zA-Z][a-zA-Z0-9_-]+ ?:/{ print "   ", $$1, comment }' $(MAKEFILE_LIST) | column -t -s ':' | grep -v 'IGNORE' | sort | uniq