Simplify worker plane structure a bit

control-plane/job-board/.gitignore

···
+.env
+
 target

worker-plane/vm/.gitignore worker-plane/.gitignore

···
+.env
+
+target
+
+alpine-with-podman.ext4
+
 vmlinux*
+
 firecracker
 firecracker.log
-alpine-with-podman.ext4

worker-plane/vm/README.md worker-plane/README.md

···
 
 Allow execution (chmod +x) on the create_alpine_rootfs.sh, then run it.
 
+Download the firecracker binary
+
+```
+ARCH="$(uname -m)"
+release_url="https://github.com/firecracker-microvm/firecracker/releases"
+latest=$(basename $(curl -fsSLI -o /dev/null -w  %{url_effective} ${release_url}/latest))
+curl -L ${release_url}/download/${latest}/firecracker-${latest}-${ARCH}.tgz \
+| tar -xz
+
+mv release-${latest}-$(uname -m)/firecracker-${latest}-${ARCH} firecracker
+```
+
+or compile it from source.
+
 `touch firecracker.log`
 
 Finally, to run the image:

worker-plane/worker-manager/.env

···
-CONTROL_PLANE_URL=ws://127.0.0.1:9001

worker-plane/worker-manager/.gitignore

···
-target