Tools: add alpine initial prereqs script

Tools/environment_install/install-prereqs-alpine.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env sh
+echo "---------- $0 start ----------"
+set -e
+set -x
+
+echo "==================================================================="
+echo "Warning: This script is not fully tested. Please report any issues."
+echo "==================================================================="
+
+
+apk update && apk add --no-cache \
+        linux-headers \
+        g++ \
+        python3 \
+        py-future \
+        py-pip \
+        libxml2-dev \
+        libxslt-dev \
+        git \
+    && ln -sf python3 /usr/bin/python \
+    &&  rm -rf /var/cache/apk/*
+
+python3 -m pip install --user --no-deps --no-cache-dir empy==3.3.4 pexpect ptyprocess --break-system-packages