chore(build): add dockerfile

Dockerfile

@@ -0,0 +1,21 @@
+FROM golang:1.25.5-alpine AS build
+
+WORKDIR /src
+
+COPY go.mod .
+COPY go.sum .
+
+RUN go mod download
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /out/trackers ./main.go
+
+
+FROM gcr.io/distroless/static:nonroot
+
+COPY --from=build /out/trackers /trackers
+
+USER nonroot:nonroot
+
+ENTRYPOINT ["/trackers"]