Add standard jekyll devcontainer

.devcontainer/Dockerfile

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+# [Choice] Debian OS version (use bullseye on local arm64/Apple Silicon): bullseye, buster
+ARG VARIANT=bullseye
+FROM mcr.microsoft.com/vscode/devcontainers/jekyll:0-${VARIANT}
+
+# [Choice] Node.js version: none, lts/*, 16, 14, 12, 10
+ARG NODE_VERSION="none"
+RUN if [ "${NODE_VERSION}" != "none" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
+
+# [Optional] Uncomment this section to install additional OS packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>
+
+# [Optional] Uncomment this line to install global node packages.
+# RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && npm install -g <your-package-here>" 2>&1

.devcontainer/base.Dockerfile

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+# [Choice] Debian OS version (use 2.7-bullseye on local arm64/Apple Silicon): 2.7-bullseye, 2.7-buster
+ARG VARIANT=2.7-bullseye
+FROM mcr.microsoft.com/vscode/devcontainers/ruby:${VARIANT}
+COPY library-scripts/meta.env /usr/local/etc/vscode-dev-containers
+
+# ENV Variables required by Jekyll
+ENV LANG=en_US.UTF-8 \
+    LANGUAGE=en_US:en \
+    TZ=Etc/UTC \
+    LC_ALL=en_US.UTF-8 \
+    LANG=en_US.UTF-8 \
+    LANGUAGE=en_US
+
+# Install bundler, latest jekyll, and github-pages for older jekyll
+RUN gem install bundler jekyll github-pages
+
+# [Choice] Node.js version: none, lts/*, 16, 14, 12, 10
+ARG NODE_VERSION="none"
+RUN if [ "${NODE_VERSION}" != "none" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
+
+# [Optional] Uncomment this section to install additional OS packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>
+
+# [Optional] Uncomment this line to install global node packages.
+# RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && npm install -g <your-package-here>" 2>&1

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.224.2/containers/jekyll
+{
+	"name": "Just the docs",
+	"build": {
+		"dockerfile": "Dockerfile",
+		"args": {
+			// Update 'VARIANT' to pick a Debian OS version: bullseye, buster
+			// Use bullseye when on local arm64/Apple Silicon.
+			"VARIANT": "bullseye",
+			// Enable Node.js: pick the latest LTS version
+			"NODE_VERSION": "lts/*"
+		}	
+	},
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": {},
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [],
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	"forwardPorts": [
+		// Jekyll server
+		4000,
+		// Live reload server
+		35729
+	],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	"postCreateCommand": "sh .devcontainer/post-create.sh",
+
+	// Comment out to connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+	"remoteUser": "vscode"
+}

.devcontainer/post-create.sh

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+#!/bin/sh
+
+# Install the version of Bundler.
+if [ -f Gemfile.lock ] && grep "BUNDLED WITH" Gemfile.lock > /dev/null; then
+    cat Gemfile.lock | tail -n 2 | grep -C2 "BUNDLED WITH" | tail -n 1 | xargs gem install bundler -v
+fi
+
+# If there's a Gemfile, then run `bundle install`
+# It's assumed that the Gemfile will install Jekyll too
+if [ -f Gemfile ]; then
+    bundle install
+fi

.vscode/tasks.json

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+{
+    // See https://go.microsoft.com/fwlink/?LinkId=733558
+    // for the documentation about the tasks.json format
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "Serve",
+            "type": "shell",
+            "command": "bundle exec jekyll serve --livereload",
+            "group": {
+                "kind": "test",
+                "isDefault": true
+            },
+            "isBackground": true,
+        },
+        {
+            "label": "Build",
+            "type": "shell",
+            "command": "bundle exec jekyll build",
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+        }
+    ]
+}