Added build files

Author: jonaz

Dockerfile

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+FROM scratch
+COPY php-metrics /
+ENTRYPOINT ["/php-metrics"]

Jenkinsfile

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+node('go1.15') {
+	container('run'){
+		def tag = ''
+
+		try {
+			stage('Checkout'){
+					checkout scm
+					notifyBitbucket()
+					tag = sh(script: 'git tag -l --contains HEAD', returnStdout: true).trim()
+			}
+
+			stage('Run test'){
+				sh('go test -v ./...')
+			}
+
+			if( tag != ''){
+				strippedTag = tag.replaceFirst('v', '')
+				stage('Build the application'){
+					echo "Building with docker tag ${strippedTag}"
+					sh('CGO_ENABLED=0 GOOS=linux go build')
+				}
+
+				stage('Generate docker image'){
+					image = docker.build('fortnox/php-metrics:'+strippedTag, '--pull .')
+				}
+
+				stage('Push docker image'){
+					docker.withRegistry("https://quay.io", 'docker-registry') {
+						image.push()
+					}
+				}
+			}
+
+			currentBuild.result = 'SUCCESS'
+		} catch(err) {
+			currentBuild.result = 'FAILED'
+			notifyBitbucket()
+			throw err
+		}
+
+		notifyBitbucket()
+	}
+}

Makefile

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+.PHONY:	build push run
+
+IMAGE = quay.io/fortnox/php-metrics
+# supply when running make: make all VERSION=1.0.0
+#VERSION = 0.0.1 
+
+build:
+	CGO_ENABLED=0 GOOS=linux go build
+
+docker: build
+	docker build --pull --rm -t $(IMAGE):$(VERSION) .
+	rm php-metrics
+
+push:
+	docker push $(IMAGE):$(VERSION)
+
+all: build docker push
+
+run:
+	docker run -i --env-file=.env --rm -p 8080:8080 -t $(IMAGE):$(VERSION)
+
+test: fmt
+	go test ./...
+
+cover:
+	@echo Running coverage
+	go get github.com/wadey/gocovmerge
+	$(eval PKGS := $(shell go list ./... | grep -v /vendor/))
+	$(eval PKGS_DELIM := $(shell echo $(PKGS) | sed -e 's/ /,/g'))
+	go list -f '{{if or (len .TestGoFiles) (len .XTestGoFiles)}}go test -test.v -test.timeout=120s -covermode=count -coverprofile={{.Name}}_{{len .Imports}}_{{len .Deps}}.coverprofile -coverpkg $(PKGS_DELIM) {{.ImportPath}}{{end}}' $(PKGS) | xargs -I {} bash -c {}
+	gocovmerge `ls *.coverprofile` > cover.out
+	rm *.coverprofile
+
+cover-html: cover
+	go tool cover -html cover.out
+cover-test: cover
+	go get github.com/jonaz/gototcov
+	gototcov -f cover.out -limit 80 -ignore-zero
+
+localrun:
+	bash -c "env `grep -Ev '^#' .env | xargs` go run *.go"
+fmt:
+	bash -c "test -z $$(gofmt -l $$(find . -type f -name '*.go' -not -path './vendor/*') | tee /dev/stderr) || (echo 'Code not formatted correctly according to gofmt!' && exit 1)"