fix: use Aliyun Alpine mirror in Dockerfiles

Alpine CDN (dl-cdn.alpinelinux.org) unreachable from DinD containers.
Switch to mirrors.aliyun.com for apk package downloads.

Co-Authored-By: Claude <noreply@anthropic.com>

auth-service/Dockerfile

@@ -8,6 +8,7 @@ WORKDIR /app/auth-service
 RUN go build -o /auth-service ./cmd/
 
 FROM ${BASE_REGISTRY}/alpine:3.20
+RUN sed -i "s|dl-cdn.alpinelinux.org|mirrors.aliyun.com|g" /etc/apk/repositories
 RUN apk add --no-cache wget
 COPY --from=builder /auth-service /auth-service
 EXPOSE 8081

gateway/Dockerfile

@@ -8,6 +8,7 @@ WORKDIR /app/gateway
 RUN go build -o /gateway ./cmd/
 
 FROM ${BASE_REGISTRY}/alpine:3.20
+RUN sed -i "s|dl-cdn.alpinelinux.org|mirrors.aliyun.com|g" /etc/apk/repositories
 RUN apk add --no-cache wget
 COPY --from=builder /gateway /gateway
 EXPOSE 8080

purchaser-service/Dockerfile

@@ -8,6 +8,7 @@ WORKDIR /app/purchaser-service
 RUN go build -o /purchaser-service ./cmd/
 
 FROM ${BASE_REGISTRY}/alpine:3.20
+RUN sed -i "s|dl-cdn.alpinelinux.org|mirrors.aliyun.com|g" /etc/apk/repositories
 RUN apk add --no-cache wget
 COPY --from=builder /purchaser-service /purchaser-service
 EXPOSE 8082

textile-service/Dockerfile

@@ -8,6 +8,7 @@ WORKDIR /app/textile-service
 RUN go build -o /textile-service ./cmd/
 
 FROM ${BASE_REGISTRY}/alpine:3.20
+RUN sed -i "s|dl-cdn.alpinelinux.org|mirrors.aliyun.com|g" /etc/apk/repositories
 RUN apk add --no-cache wget
 COPY --from=builder /textile-service /textile-service
 EXPOSE 8083

washing-service/Dockerfile

@@ -8,6 +8,7 @@ WORKDIR /app/washing-service
 RUN go build -o /washing-service ./cmd/
 
 FROM ${BASE_REGISTRY}/alpine:3.20
+RUN sed -i "s|dl-cdn.alpinelinux.org|mirrors.aliyun.com|g" /etc/apk/repositories
 RUN apk add --no-cache wget
 COPY --from=builder /washing-service /washing-service
 EXPOSE 8084