Change to debian:bookworm-slim as base image for the controller

See merge request !620

controller/controller.Dockerfile

@@ -9,7 +9,7 @@ RUN --mount=type=cache,target=/root/go/pkg/mod \
     --mount=type=cache,target=/root/.cache/go-build \
     make build-gosdn
 
-FROM ${GITLAB_PROXY}golang:$GOLANG_VERSION-bookworm
+FROM ${GITLAB_PROXY}debian:bookworm-slim
 WORKDIR /app/
 COPY --from=builder /gosdn/controller/configs/development-gosdn.toml.example ./configs/development-gosdn.toml
 COPY --from=builder /gosdn/controller/configs/containerlab-gosdn.toml.example ./configs/containerlab-gosdn.toml