feat: add Go workload deployment artifacts and split Ingress routing

backend/Dockerfile

@@ -0,0 +1,22 @@
+# syntax=docker/dockerfile:1
+# Build context: the repository backend/ directory.
+#   docker build -f backend/Dockerfile -t REGISTRY/PROJECT/zhinian-go-api:TAG backend/
+
+FROM golang:1.21-alpine AS build
+WORKDIR /src
+ENV CGO_ENABLED=0 GOOS=linux
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN go build -trimpath -ldflags="-s -w" -o /out/zhinian-api ./cmd/zhinian-api
+
+FROM alpine:3.20
+RUN apk add --no-cache ca-certificates tzdata \
+    && addgroup -S -g 10001 zhinian \
+    && adduser -S -D -H -u 10001 -G zhinian zhinian \
+    && mkdir -p /var/lib/zhinian \
+    && chown -R zhinian:zhinian /var/lib/zhinian
+COPY --from=build /out/zhinian-api /usr/local/bin/zhinian-api
+USER 10001:10001
+EXPOSE 8080
+ENTRYPOINT ["zhinian-api"]