ci: add dnf cache

containers/fedora/Containerfile

@@ -1,7 +1,8 @@
 FROM quay.io/fedora/fedora:43
 
 # === install system packages ===
-RUN dnf update -y && \
+RUN --mount=type=cache,target=/var/cache/dnf \
+  dnf update -y && \
   dnf copr enable -y atim/lazygit && \
   dnf -y install procps ping bash-completion glibc-langpack-en \
     host-spawn dbus-launch \

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,target=/var/cache/dnf \
+  dnf -y install go && dnf clean all
 
 USER user

containers/infra/Containerfile

@@ -2,7 +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,target=/var/cache/dnf \
+  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')" && \
   dnf clean all && \
   curl -sL https://talos.dev/install | sh && \
   curl -s https://fluxcd.io/install.sh | bash