chore: add docker file (#9)

#### What type of PR is this?
/kind chore

#### What this PR does / why we need it:
add docker file of project

Dockerfile

@@ -0,0 +1,18 @@
+FROM golang:1.19 as builder
+
+WORKDIR /workspace
+COPY go.mod go.mod
+COPY go.sum go.sum
+RUN go mod download
+
+COPY cmd/ cmd/
+COPY pkg/ pkg/
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o karbour cmd/main.go
+
+FROM alpine:3.17.3
+
+WORKDIR /
+COPY --from=builder /workspace/karbour .
+
+ENTRYPOINT ["/karbour"]