docker: also add clang-format to the docker images

.dockerignore

@@ -22,10 +22,12 @@
 #       is explicitly mentioned in the Dockerfile) or will not grab it (if the
 #       file is indirectly referenced through a wildcard).
 
+!/.clang-format
 !/cmake
 !/CMakeLists.txt
 !/engine
 !/infra
+!/Makefile
 !/README.md
 !/scripts
 !/specs

Dockerfile.fedora38

@@ -7,6 +7,7 @@ FROM fedora:38
 RUN dnf install -y \
     autoconf \
     automake \
+    clang-tools-extra \
     cmake \
     g++ \
     gcc \

Dockerfile.ubuntu22.04

@@ -9,6 +9,7 @@ RUN apt update && apt install --no-install-recommends -y \
     automake \
     bsdextrautils \
     ca-certificates \
+    clang-format-15 \
     cmake \
     g++ \
     gcc \