Added diffutils and a basic README file

Containerfile

@@ -30,6 +30,7 @@ COPY files/vscode.repo /etc/yum.repos.d/
 #
 #         bind-utils - for basic DNS troubleshooting
 #               code - VS Code
+#          diffutils - diff tools
 #             direnv - for managing dev environment variables
 #              helix - modern text editor
 #               make - for running make tasks
@@ -43,6 +44,6 @@ COPY files/vscode.repo /etc/yum.repos.d/
 #                rcm - managing dotfiles
 #               tmux - managing screen sessions
 #
-RUN dnf install -y bind-utils code direnv helix make man-db pass pinentry poetry pre-commit pwgen python3-lsp-server \
-                   rcm tmux && \
+RUN dnf install -y bind-utils code diffutils direnv helix make man-db pass pinentry poetry pre-commit pwgen \
+                   python3-lsp-server rcm tmux && \
     dnf clean all

README.md

@@ -0,0 +1,47 @@
+# My Dev Toolbox
+
+> This image is meant to be used with the toolbox-create(1) command.
+
+Since I started using [Fedora Silverblue] I've switched my workflow to use toolbox to set up my dev environments,
+instead of overlaying packages, trying to keep my deployments as clean as possible.
+
+As I was learing my ways around it, I kept having to re-create my toolboxes and had to run multiple commands everytime
+to set them up as I wanted it to.
+
+Eventually, I wrote a bash script, which worked fine.
+
+But recently I came across the **Custom Images** section of the [Toolbx Documentation], where it describes how one can
+go on to create their own custom Toolbx image and use that.
+
+This repo is set up to track my Containerfile of my custom image for dev work, as well as notes and scripts related to
+it.
+
+The relevant GitHub Actions were set up in order to build a new image everytime my Containerfile, or the files in the
+`files` directory change.
+
+## Versioning
+
+The latest version of image _should_ always be available as `ghcr.io/elromanos/dev-toolbox:latest`.
+
+A cron job is defined to run and update it once a week, with the latest Fedora repo updates. The tag for such images is
+set as **YY.WW** where **YY** is the last two digits of the year and **WW** the week number it was build.
+
+## Setup
+
+In order for the custom image to be loaded by default when I create a new toolbox, I need to override toolbox's default
+settings. To do so, I had to create the `~/.config/containers/toolbox.conf` file with the following TOML content:
+
+```toml
+[general]
+image = "ghcr.io/elromanos/dev-toolbox"
+```
+
+## F.A.Q.
+
+- **Q: Why Podman and not Docker?** A: [Fedora Silverblue] comes with Podman pre-installed. As I want to keep my base
+  image as close to the defaults as possible, I decided to keep using Podman. For the simple needs of this exercise,
+  Docker and Podman __should__ be interchangable/compatible.
+
+[Fedora Silverblue]: https://fedoraproject.org/atomic-desktops/silverblue/
+[Toolbx Documentation]: https://containertoolbx.org/doc/
+[Red Hat Actions]: https://github.com/redhat-actions