Switch to use go module, fmt, docker changes, go 1.14 (#5)

* run gofmt

* Switch to use go module, fmt, docker changes

.dockerignore

@@ -0,0 +1,4 @@
+*
+!main.go
+!go.mod
+!go.sum

Dockerfile

@@ -1,13 +1,13 @@
-FROM golang:1.12.1
-WORKDIR /go/src/github.com/deliveryhero/k8s-event-logger
-COPY main.go .
-RUN go get -d -v ./...
-RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .
+FROM golang:1.14.0 as builder
+WORKDIR /go/src/github.com/max-rocket-internet/k8s-event-logger
+COPY . .
+RUN go get
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o k8s-event-logger
 RUN adduser --disabled-login --no-create-home --disabled-password --system --uid 101 non-root
+
 FROM alpine:3.9.3
-RUN apk --no-cache add ca-certificates
-WORKDIR /
-COPY --from=0 /go/src/github.com/deliveryhero/k8s-event-logger/main k8s-event-logger
-USER 101
+RUN addgroup -S non-root && adduser -S -G non-root non-root
+USER non-root
 ENV USER non-root
+COPY --from=builder /go/src/github.com/max-rocket-internet/k8s-event-logger/k8s-event-logger k8s-event-logger
 CMD ["/k8s-event-logger"]

go.mod

@@ -0,0 +1,13 @@
+module github.com/max-rocket-internet/k8s-event-logger
+
+go 1.14
+
+require (
+	github.com/imdario/mergo v0.3.9 // indirect
+	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d // indirect
+	golang.org/x/time v0.0.0-20200416051211-89c76fbcd5d1 // indirect
+	k8s.io/api v0.18.2
+	k8s.io/apimachinery v0.18.2
+	k8s.io/client-go v0.18.2
+	k8s.io/utils v0.0.0-20200414100711-2df71ebbae66 // indirect
+)