Mention the repository GPG key, and restore other detailed installati…

docs/modules/ROOT/pages/installation/binaries.adoc

@@ -12,4 +12,35 @@ We provide OS packages for RHEL/CentOS 7 & 8 as well as Debian 10 (buster).
 * EL8: https://repo.stackable.tech/repository/rpm-release/el8/
 * Debian 10: https://repo.stackable.tech/repository/deb-release
 
-Add these repositories to your OS and then install the `stackable-agent` package.
+Add these repositories to your OS, such as as suggested below, and then install the `stackable-agent` package.
+
+=== Configuring the Stackable OS package repository
+
+You will need to configure the Stackable OS package repository on the worker nodes.
+
+==== Debian and Ubuntu
+    apt-get install gnupg curl
+    apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 16dd12f5c7a6d76a
+    echo "deb https://repo.stackable.tech/repository/deb-release buster main" > /etc/apt/sources.list.d/stackable.list
+
+==== Red Hat and CentOS
+    /usr/bin/yum -y install gnupg2 curl
+    /usr/bin/curl -s "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0xce45c7a0a3e41385acd4358916dd12f5c7a6d76a" > /etc/pki/rpm-gpg/RPM-GPG-KEY-stackable
+    /usr/bin/rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-stackable
+    echo "[stackable]
+    name=Stackable dev repo
+    baseurl=https://repo.stackable.tech/repository/rpm-dev/el\$releasever/
+    enabled=1
+    gpgcheck=0" > /etc/yum.repos.d/stackable.repo
+    /usr/bin/yum clean all
+
+=== Installation of the Stackable agent
+
+You will then need to install the Stackable agent and it's prerequite packages
+
+==== Debian and Ubuntu
+    apt-get install openjdk-11-jdk stackable-agent
+
+==== Red Hat and CentOS
+    /usr/bin/yum -y install java-11-openjdk stackable-agent
+