Add docker build env

Dockerfile

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+FROM alpine:3.16
+LABEL maintainer="Ben V. Brown <ralim@ralimtek.com>"
+
+RUN apk add --no-cache gcc-arm-none-eabi newlib-arm-none-eabi make git bash
+WORKDIR /src
+# Git trust
+RUN git config --global --add safe.directory /src
+
+COPY . /src

docker-compose.yml

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+version: "3"
+services:
+  builder:
+    stdin_open: true
+    tty: true
+    build:
+      context: .
+    command: /bin/bash
+    volumes:
+      - ./:/src:Z

start_dev.sh

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+#!/bin/sh
+docker-compose run --rm builder