Add comments to clarify build directory setup and root filesystem creation steps in Makefile CI

Author: andrewmcwatters

.github/workflows/makefile.yml

@@ -39,6 +39,7 @@ jobs:
       if: steps.cache-kernel.outputs.cache-hit != 'true'
       run: sudo apt-get install -y libelf-dev
 
+    # https://docs.kernel.org/admin-guide/README.html#build-directory-for-the-kernel
     # https://docs.kernel.org/admin-guide/README.html#configuring-the-kernel
     - name: Configure the kernel
       if: steps.cache-kernel.outputs.cache-hit != 'true'
@@ -56,6 +57,8 @@ jobs:
     - name: Build root filesystem
       run: |
         mkdir -p iso/boot
+        pwd
+        ls -l
 
     # https://docs.kernel.org/filesystems/ramfs-rootfs-initramfs.html
     # https://docs.kernel.org/filesystems/ramfs-rootfs-initramfs.html#contents-of-initramfs