add: docker 打包

Dockerfile

@@ -0,0 +1,34 @@
+# syntax=docker/dockerfile:1.4
+FROM golang:1.22-alpine AS builder
+WORKDIR /src
+
+# Pre-fetch deps
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy source
+COPY . .
+
+# Build static binary for target platform
+ARG TARGETOS
+ARG TARGETARCH
+ENV CGO_ENABLED=0
+RUN GOOS=$TARGETOS GOARCH=$TARGETARCH \
+    go build -trimpath -ldflags="-s -w" -o /out/server ./cmd/server
+
+FROM gcr.io/distroless/static:nonroot
+WORKDIR /app
+
+# App binary
+COPY --from=builder /out/server /app/server
+
+# Default lexicon files
+COPY Vocabulary /app/Vocabulary
+
+# Default envs
+ENV PORT=8080
+ENV LEXICON_DIR=Vocabulary
+
+EXPOSE 8080
+USER nonroot
+ENTRYPOINT ["/app/server"]