Merge remote-tracking branch 'origin/refs/pull/199/head' into staging

README.md

@@ -24,12 +24,12 @@ For a full list of images see the "packages" directory.
 
 Get a shell in our x86_64 Stage3 bootstrap image:
 
-```sh
+```shell
 docker run -it stagex/stage3
 ```
 
 Run a Python hello world:
-```sh
+```shell
 docker run -i stagex/python -c "print('hello world')"
 ```
 
@@ -259,6 +259,7 @@ For further reading see the [Bootstrappable Builds](https://bootstrappable.org/)
 
 * An OCI building runtime
     * Currently Docker supported (v25+)
+        * [`containerd` support](https://docs.docker.com/engine/storage/containerd/#enable-containerd-image-store-on-docker-engine) is required
     * Support for buildah and podman coming soon
 	
 * Gnu Make
@@ -267,25 +268,27 @@ For further reading see the [Bootstrappable Builds](https://bootstrappable.org/)
 
 #### Reproduce entire tree
 
-```sh
+```shell
 make
 ```
 
 #### Compile specific package
 
-```sh
+```shell
 make rust
 ```
 
 #### Compile specific package without cache
 
-```sh
+```shell
 make NOCACHE=1
 ```
 
 #### Sign all locally built packages (WIP)
 
-```sh
+Do this after successfully reproducing all packages and stages:
+
+```shell
 make sign
 ```