tutorial: base image and dev container

builder.Dockerfile

@@ -0,0 +1,21 @@
+ARG base_tag=bullseye
+ARG base_img=mcr.microsoft.com/vscode/devcontainers/base:dev-${base_tag}
+# ARG base_img=debian:${base_tag}
+
+FROM --platform=linux/amd64 ${base_img} AS builder-install
+
+RUN apt-get update --fix-missing && apt-get -y upgrade
+RUN apt-get install -y --no-install-recommends \
+    apt-utils \
+    curl \
+    cmake \
+    build-essential \
+    gcc \
+    g++-multilib \
+    locales \
+    make \
+    ruby \
+    gcovr \
+    wget \
+    && rm -rf /var/lib/apt/lists/*
+