Add docker file and deployment instruction for k8s

Author: anhthii

Dockerfile

@@ -0,0 +1,26 @@
+FROM golang:1.25 AS builder
+
+ARG TARGETOS=linux
+ARG TARGETARCH=amd64
+
+WORKDIR /src
+
+COPY go.mod go.sum ./
+RUN --mount=type=cache,target=/go/pkg/mod \
+    go mod download
+
+COPY . .
+
+RUN --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} \
+    go build -o /out/mpcium ./cmd/mpcium
+
+FROM gcr.io/distroless/base-debian12:latest
+
+USER nonroot:nonroot
+WORKDIR /app
+
+COPY --from=builder /out/mpcium /app/mpcium
+
+ENTRYPOINT ["/app/mpcium"]