ci: add dnf cache

containers/fedora/Containerfile

@@ -1,16 +1,15 @@
 FROM quay.io/fedora/fedora:43
 
 # === install system packages ===
-RUN dnf update -y && \
+RUN --mount=type=cache,id=dnf-cache,target=/var/cache/libdnf5 \
+  dnf update -y && \
   dnf copr enable -y atim/lazygit && \
-  dnf -y install procps ping bash-completion glibc-langpack-en \
+  dnf -y --setopt=keepcache=1 install procps ping bash-completion glibc-langpack-en \
     host-spawn dbus-launch \
-    zoxide git npm neovim awk jq unzip fd-find lazygit && \
+    zoxide git npm neovim awk jq unzip fd-find lazygit
-  dnf clean all
 
 # === setup user ===
-RUN useradd -ms /bin/bash user && \
+RUN useradd -ms /bin/bash user && echo 'user ALL=NOPASSWD: ALL' > /etc/sudoers
-  echo 'user ALL=NOPASSWD: ALL' > /etc/sudoers
 
 USER user
 WORKDIR /home/user

containers/go/Containerfile

@@ -2,6 +2,7 @@ ARG TAG
 FROM job79/fedora:${TAG}
 USER root
 
-RUN dnf -y install go && dnf clean all
+RUN --mount=type=cache,id=dnf-cache,target=/var/cache/libdnf5 \
+  dnf -y --setopt=keepcache=1 install go
 
 USER user

containers/infra/Containerfile

@@ -2,8 +2,8 @@ ARG TAG
 FROM job79/fedora:${TAG}
 USER root
 
-RUN dnf -y install kubectl k9s openssl age "$(curl -s https://api.github.com/repos/getsops/sops/releases/latest | jq -r '.assets[] | select(.name | test("sops-.*.x86_64.rpm$")) | .browser_download_url')" && \
+RUN --mount=type=cache,id=dnf-cache,target=/var/cache/libdnf5 \
-  dnf clean all && \
+  dnf -y --setopt=keepcache=1 install kubectl k9s openssl age "$(curl -s https://api.github.com/repos/getsops/sops/releases/latest | jq -r '.assets[] | select(.name | test("sops-.*.x86_64.rpm$")) | .browser_download_url')" && \
   curl -sL https://talos.dev/install | sh && \
   curl -s https://fluxcd.io/install.sh | bash