fixup! Add package caching for CI

common_py/Dockerfile

@@ -4,8 +4,7 @@ FROM python:3.13-slim AS base
 ARG PIP_CACHE_DIR=
 ARG APT_CACHE_DIR=
 RUN rm -f /etc/apt/apt.conf.d/docker-clean
-RUN if ! [ -z "$APT_CACHE_DIR" ]; then echo "Dir::Cache::Archives $APT_CACHE_DIR" >>  /etc/apt/apt.conf.d/ci_caching; fi
-
+RUN if ! [ -z "$APT_CACHE_DIR" ]; then echo "Dir::Cache::Archives $APT_CACHE_DIR" > /etc/apt/apt.conf.d/ci_caching; fi
 
 WORKDIR /code
 

job_controller/jobs/ffmpeg_base/Dockerfile

@@ -8,7 +8,7 @@ FROM registry.git.fsmpi.rwth-aachen.de/videoag/backend/${ENV_TYPE}_job_base:${GI
 # READ THE NOTE on caching in the README before changing this/for more info!
 ARG APT_CACHE_DIR=
 RUN rm -f /etc/apt/apt.conf.d/docker-clean
-RUN if ! [ -z "$APT_CACHE_DIR" ]; then echo "Dir::Cache::Archives $APT_CACHE_DIR" >>  /etc/apt/apt.conf.d/ci_caching; fi
+RUN if ! [ -z "$APT_CACHE_DIR" ]; then echo "Dir::Cache::Archives $APT_CACHE_DIR" > /etc/apt/apt.conf.d/ci_caching; fi
 
 RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --mount=type=cache,target=/var/lib/apt,sharing=locked \