chore: prevent more unnecessary files in the output images

Author: rjaegers

.devcontainer/cpp/Dockerfile

@@ -18,6 +18,7 @@ SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 RUN --mount=type=bind,source=.devcontainer/cpp/apt-requirements-base.json,target=/tmp/apt-requirements-base.json \
     --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --mount=type=cache,target=/var/lib/apt,sharing=locked \
+    --mount=type=cache,target=/var/log,sharing=locked \
  apt-get update && apt-get install -y --no-install-recommends jq \
  && jq -r 'to_entries | .[] | .key + "=" + .value' /tmp/apt-requirements-base.json | xargs apt-get install -y --no-install-recommends
 
@@ -40,6 +41,8 @@ ENV CCACHE_DIR=/cache/.ccache \
 RUN --mount=type=bind,source=.devcontainer/cpp/apt-requirements-clang.json,target=/tmp/apt-requirements-clang.json \
     --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --mount=type=cache,target=/var/lib/apt,sharing=locked \
+    --mount=type=cache,target=/var/log,sharing=locked \
+    --mount=type=cache,target=/tmp,sharing=locked \
  wget -qO - https://apt.llvm.org/llvm-snapshot.gpg.key | gpg --dearmor -o /usr/share/keyrings/llvm-snapshot-keyring.gpg \
  && wget -qO - https://dl.cloudsmith.io/public/mull-project/mull-stable/gpg.41DB35380DE6BD6F.key | gpg --dearmor -o /usr/share/keyrings/mull-project-mull-stable-archive-keyring.gpg \
  && UBUNTU_CODENAME=$(grep '^UBUNTU_CODENAME=' /etc/os-release | cut -d= -f2) \

.devcontainer/rust/Dockerfile

@@ -15,6 +15,7 @@ SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 RUN --mount=type=bind,source=.devcontainer/rust/apt-requirements-base.json,target=/tmp/apt-requirements-base.json \
     --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --mount=type=cache,target=/var/lib/apt,sharing=locked \
+    --mount=type=cache,target=/var/log,sharing=locked \
  apt-get update && apt-get install -y --no-install-recommends jq \
  && jq -r 'to_entries | .[] | .key + "=" + .value' /tmp/apt-requirements-base.json | xargs apt-get install -y --no-install-recommends