Use latest debian and add build-essential.

(A dependency of cargo-audit now needs a C compiler it seems)

Author: vext01

.buildbot_dockerfile_debian

@@ -1,8 +1,8 @@
-FROM debian:bullseye
+FROM debian:latest
 ARG CI_UID
 RUN useradd -m -u ${CI_UID} ci
 RUN apt-get update && \
-    apt-get -y install flake8 procps
+    apt-get -y install build-essential flake8 procps
 WORKDIR /ci
 RUN chown ${CI_UID}:${CI_UID} .
 COPY --chown=${CI_UID}:${CI_UID} . .