feat: initialize managed portal

Dockerfile

@@ -0,0 +1,37 @@
+FROM swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/library/golang:1.25.4-alpine AS builder
+
+ENV TZ=Asia/Shanghai
+
+RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories
+RUN apk add --no-cache ca-certificates tzdata
+
+WORKDIR /build
+
+COPY go.mod ./
+RUN go mod download
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux go build \
+    -a -installsuffix cgo \
+    -o managed-portal \
+    ./cmd/managed-portal
+
+FROM swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/library/alpine:3.23
+
+ENV TZ=Asia/Shanghai \
+    MANAGED_PORTAL_HTTP_ADDR=:8080 \
+    MANAGED_PORTAL_REGISTRY_PATH=/app/managed_services.yaml
+
+RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories && \
+    apk add --no-cache docker-cli ca-certificates tzdata && \
+    rm -rf /var/cache/apk/*
+
+WORKDIR /app
+
+COPY --from=builder /build/managed-portal /app/managed-portal
+COPY managed_services.yaml /app/managed_services.yaml
+
+EXPOSE 8080
+
+CMD ["/app/managed-portal"]