cleanup docker files and build/test procedure

scripts/install-build-deps.sh

@@ -0,0 +1,18 @@
+#!/bin/bash -e
+#
+# Install build dpenedencies.
+
+source /etc/os-release
+set -x
+
+case $ID in
+	ubuntu*)
+		apt-get install -y gcc make cmake libssh-dev
+		;;
+	centos* | rhel*)
+		dnf install -y gcc make cmake libssh-devel rpm-build
+		;;
+	*)
+		echo "unsupported dependency install: $ID"
+		exit 1
+esac