ci: add dockerfile

Dockerfile

@@ -0,0 +1,18 @@
+FROM golang:1.22.3-alpine as builder
+
+WORKDIR /usr/src/app
+
+# pre-copy/cache go.mod for pre-downloading dependencies and only redownloading them in subsequent builds if they change
+COPY go.mod go.sum ./
+RUN go mod download && go mod verify
+
+COPY . .
+RUN go build -v -o konulukonum
+
+RUN go test -v ./...
+
+FROM alpine
+WORKDIR /root/app
+COPY --from=builder /usr/src/app .
+
+CMD ["./konulukonum"]