Added docker support

Dockerfile

@@ -0,0 +1,19 @@
+FROM --platform=$BUILDPLATFORM golang:1.26-alpine AS builder
+
+RUN apk add --no-cache git
+WORKDIR /app
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+
+ARG TARGETOS
+ARG TARGETARCH
+
+RUN CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH \
+    go build -ldflags "-s -w" -o MiauInv .
+
+FROM scratch
+COPY --from=builder /app/MiauInv /MiauInv
+ENTRYPOINT ["/MiauInv"]