root: docker: ensure apt packages are up-to-date (#12683)

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

proxy.Dockerfile

@@ -59,6 +59,11 @@ LABEL org.opencontainers.image.source=https://github.com/goauthentik/authentik
 LABEL org.opencontainers.image.version=${VERSION}
 LABEL org.opencontainers.image.revision=${GIT_BUILD_HASH}
 
+RUN apt-get update && \
+    apt-get upgrade -y && \
+    apt-get clean && \
+    rm -rf /tmp/* /var/lib/apt/lists/*
+
 COPY --from=builder /go/proxy /
 COPY --from=web-builder /static/robots.txt /web/robots.txt
 COPY --from=web-builder /static/security.txt /web/security.txt