various updates

README.md

@@ -3,7 +3,7 @@
 ## Requirements
 
 ```
-ansible-galaxy install -r requirements.yml
+ansible-galaxy install -r requirements.yaml
 ```
 
 ## Roles
@@ -13,6 +13,7 @@ Basic server setup:
 - `hostname`    Set hostname, FQDN.
 - `tz`          Set TZ `Europe/Moscow`.
 - `locale`      Generate and set locale `en_US.utf-8`.
+- `apt`         Configute APT.
 - `packages`    Install admin tools e.g. vim, tree, etc.
 - `dotfiles`    Add dotfiles for root and /etc/skel.
 - `motd`        Modify MOTD.
@@ -21,5 +22,6 @@ Basic server setup:
 
 Other:
 
-- `avahi`       Install and configure Avahi daemon for mDNS.
-- `docker`      Install Docker Engine.
+- `avahi`           Install and configure Avahi daemon for mDNS.
+- `docker`          Install Docker Engine from OS repository.
+- `docker-upstream` Install Docker Engine from upstream repository.