Merge pull request #312 from im-kulikov/Update-Makefile_Dockerfile_Readme

- Make Dockerfile useful and minimal
- Update Makefile commands build / image
- Docker should not ignore vendor (go build -mod=vendor)
- Used git to receive version from tags (see #304)
- Version now displayed when start node (fix #102)
```
    Example:
    
    → ./bin/node --version
    neo-go version 0.44.10-245-g67d5e9f
    
    → ./bin/node -v
    neo-go version 0.44.10-245-g67d5e9f
```
- add go minimal version
- fix dependency manager

.dockerignore

@@ -1,3 +1,2 @@
-vendor
 .git
 chains

Dockerfile

@@ -1,16 +1,40 @@
-FROM vidsyhq/go-base:latest
-LABEL maintainers="anthdm,stevenjack"
+# Builder image
+FROM golang:1.12-alpine3.10 as builder
 
-ENV NETMODE=testnet
+RUN set -x \
+    && apk add --no-cache git \
+    && mkdir -p /tmp
 
-ARG VERSION
+COPY . /neo-go
+
+WORKDIR /neo-go
+
+ARG REPO=repository
+ARG VERSION=dev
+
+# https://github.com/golang/go/wiki/Modules#how-do-i-use-vendoring-with-modules-is-vendoring-going-away
+# go build -mod=vendor
+RUN set -x \
+    && export BUILD_TIME=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
+    && export GOGC=off \
+    && export CGO_ENABLED=0 \
+    && export LDFLAGS="-X ${REPO}/config.Version=${VERSION} -X ${REPO}/config.BuildTime=${BUILD_TIME}" \
+    && go build -v -mod=vendor -ldflags "${LDFLAGS}" -o /go/bin/node ./cli/main.go
+
+# Executable image
+FROM alpine:3.10
+
+ENV   NETMODE=testnet
+ARG   VERSION
 LABEL version=$VERSION
 
-ADD bin/neo-go /usr/bin/neo-go
-ADD config /config
+WORKDIR /
 
-RUN chmod u+x /usr/bin/neo-go
-RUN mkdir -p /chains
+ENV NETMODE=testnet
+COPY --from=builder /neo-go/config   /config
+COPY --from=builder /go/bin/node     /usr/bin/node
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+
+ENTRYPOINT ["/usr/bin/node"]
 
-ENTRYPOINT ["neo-go"]
 CMD ["node", "--config-path", "./config", "--testnet"]

Makefile

@@ -1,19 +1,24 @@
 BRANCH = "master"
 BUILD_TIME = "$(shell date -u +\"%Y-%m-%dT%H:%M:%SZ\")"
-VERSION = $(shell cat ./VERSION)
 REPONAME = "neo-go"
 NETMODE ?= "privnet"
 
-build:
-	@echo "=> Building darwin binary"
-	@go build -i -ldflags "-X github.com/CityOfZion/neo-go/config.Version=${VERSION}-dev -X github.com/CityOfZion/neo-go/config.BuildTime=${BUILD_TIME}" -o ./bin/neo-go ./cli/main.go
+REPO ?= "$(shell go list -m)"
+VERSION ?= "$(shell git describe --tags 2>/dev/null | sed 's/^v//')"
+BUILD_FLAGS = "-X $(REPO)/config.Version=$(VERSION) -X $(REPO)/config.BuildTime=$(BUILD_TIME)"
 
-build-image:
-	docker build -t cityofzion/neo-go --build-arg VERSION=${VERSION} .
+build: deps
+	@echo "=> Building binary"
+	@set -x \
+		&& export GOGC=off \
+		&& export CGO_ENABLED=0 \
+		&& echo $(VERSION)-$(BUILD_TIME) \
+		&& go build -v -mod=vendor -ldflags $(BUILD_FLAGS) -o ./bin/node ./cli/main.go
 
-build-linux:
-	@echo "=> Building linux binary"
-	@GOOS=linux go build -i -ldflags "-X github.com/CityOfZion/neo-go/config.Version=${VERSION}-dev -X github.com/CityOfZion/neo-go/config.BuildTime=${BUILD_TIME}" -o ./bin/neo-go ./cli/main.go
+image: deps
+	@echo "=> Building image"
+	@docker build -t cityofzion/neo-go:latest --build-arg REPO=$(REPO) --build-arg VERSION=$(VERSION) .
+	@docker build -t cityofzion/neo-go:$(VERSION) --build-arg REPO=$(REPO) --build-arg VERSION=$(VERSION) .
 
 check-version:
 	git fetch && (! git rev-list ${VERSION})
@@ -25,7 +30,8 @@ clean-cluster:
 	@docker-compose rm -f
 
 deps:
-	@dep ensure
+	@go mod tidy -v
+	@go mod vendor
 
 push-tag:
 	git checkout ${BRANCH}

README.md

@@ -31,9 +31,11 @@ A complete toolkit for the NEO blockchain, including:
 
 ## Installation
 
+Go: 1.11+
+
 Install dependencies.
 
-`neo-go` uses [dep](https://github.com/golang/dep) as its dependency manager. After installing `deps` you can run:
+`neo-go` uses [GoModules](https://github.com/golang/go/wiki/Modules) as dependency manager:
 
 ```
 make deps

cli/main.go

@@ -7,12 +7,14 @@ import (
 	"github.com/CityOfZion/neo-go/cli/smartcontract"
 	"github.com/CityOfZion/neo-go/cli/vm"
 	"github.com/CityOfZion/neo-go/cli/wallet"
+	"github.com/CityOfZion/neo-go/config"
 	"github.com/urfave/cli"
 )
 
 func main() {
 	ctl := cli.NewApp()
 	ctl.Name = "neo-go"
+	ctl.Version = config.Version
 	ctl.Usage = "Official Go client for Neo"
 
 	ctl.Commands = []cli.Command{