README.md: Link to coreos.fp.org, other misc minor tweaks
-This container aggregates various tools used to build Fedora CoreOS style
-systems, including:
+This container aggregates various tools used to build [Fedora CoreOS](https://github.com/coreos/coreos.fedoraproject.org)
+style systems.
+
+It reuses various upstream tools, such as:
- [mantle](https://github.com/coreos/mantle)
- [rpm-ostree](https://github.com/projectatomic/rpm-ostree/)
@@ -21,7 +23,7 @@ Setup
---
Here we store data in `/srv/coreos` on our host system. You can choose
-any directory you like.
+any directory you like. You should run these commands as `root`.
```
$ mkdir /srv/coreos
@@ -52,7 +54,7 @@ $ coreos-assembler build
```
Each build will write an ostree commit into `/srv/coreos/repo` as well
-as generate VM images in `/srv/coreos/builds/$datestamp`.
+as generate VM images in `/srv/coreos/builds/`.
Development
---
