add first pass at a dockerfile

Dockerfile

@@ -0,0 +1,17 @@
+FROM golang:1.22-alpine AS builder
+
+WORKDIR /app
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY main.go ./
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o object-holder .
+
+FROM alpine:latest
+
+WORKDIR /root/
+
+COPY --from=builder /app/object-holder .
+
+ENTRYPOINT ["./object-holder"]