refactor!: separate runtime releases from panel source

Dockerfile

@@ -11,7 +11,6 @@ COPY go.mod go.sum ./
 RUN go mod download
 COPY cmd/ ./cmd/
 COPY internal/ ./internal/
-COPY image/ ./image/
 RUN CGO_ENABLED=0 go build -trimpath -o /out/dsh-mgr ./cmd/server
 
 FROM debian:bookworm-slim
@@ -19,7 +18,6 @@ RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates
 WORKDIR /app
 COPY --from=backend /out/dsh-mgr /usr/local/bin/dsh-mgr
 COPY --from=web /src/web/dist ./web/dist
-COPY image/ ./image/
 USER 1000:1000
 EXPOSE 8088
 HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 CMD ["/usr/local/bin/dsh-mgr", "-healthcheck"]