doc: merged apt-get install lines
@@ -42,8 +42,7 @@ apk add --repository "http://dl-cdn.alpinelinux.org/alpine/edge/testing" elektra
docker run -it debian:buster
apt-get update
apt-get install ca-certificates
-apt-get install vim
-apt-get install gnupg
+apt-get install vim gnupg
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys F26BBE02F3C315A19BF1F791A9A25CC1CC83E839
vim /etc/apt/sources.list
```
