Extend README.md

Extend README.md with more info about the project.

Signed-off-by: Sergio Lopez <[email protected]>

README.md

@@ -1,3 +1,66 @@
 # krunvm
 
 ```krunvm``` is a CLI-based utility for managing lightweight VMs created from OCI images, using [libkrun](https://github.com/containers/libkrun) and [buildah](https://github.com/containers/buildah).
+
+## Features
+
+* Minimal footprint
+* Fast boot time
+* Zero disk image maintenance
+* Zero network configuration
+* Support for mapping host volumes into the guest
+* Support for exposing guest ports to the host
+
+## Demo
+
+[![asciicast](https://asciinema.org/a/CGtTS93VsdzWwUfkY1kqVnaik.svg)](https://asciinema.org/a/CGtTS93VsdzWwUfkY1kqVnaik)
+
+## Installation
+
+### macOS
+
+```
+brew tap slp/krun
+brew install krunvm
+```
+
+### Fedora
+
+```
+dnf copr enable slp/libkrunfw
+dnf copr enable slp/libkrun
+dnf copr enable slp/krunvm
+dnf install krunvm
+```
+
+### Building from sources
+
+#### Dependencies
+
+* Rust Toolchain
+* [libkrun](https://github.com/containers/libkrun)
+* [buildah](https://github.com/containers/buildah)
+
+#### Building
+
+```
+cargo build --release
+```
+
+## Limitations
+
+### Networking
+
+#### Networking support is limited to TCP IPv4
+
+The current implementation of TSI (Transparent Socket Impersonation)
+in libkrun is limited to TCP and IPv4. This is expected to improve
+soon.
+
+#### Domain name resolution is broken on musl-based distributions
+
+As a consequence of the previous point, libkrun-based VMs need to use
+TCP for connecting to the DNS servers. **musl libc** does not support
+domain name resolution using TCP, so on distributions based on this
+library (such as Alpine), name resolution is broken.
+