added devcontainer

.devcontainer/devcontainer.json

@@ -0,0 +1,23 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/jekyll
+{
+    "name": "AtlassianPS Dev Environment - Jekyll",
+    "image": "mcr.microsoft.com/devcontainers/jekyll:2-bullseye",
+    "features": {
+        "ghcr.io/devcontainers-contrib/features/zsh-plugins:0": {}
+    },
+    "postCreateCommand": ".devcontainer/post-create.sh",
+    "customizations": {
+        "vscode": {
+            "settings": {}
+        },
+        "extensions": [
+            "DavidAnson.vscode-markdownlint",
+            "editorconfig.editorconfig",
+            "ginfuru.ginfuru-vscode-jekyll-syntax",
+            "ginfuru.vscode-jekyll-snippets",
+            "jasonnutter.vscode-codeowners",
+            "streetsidesoftware.code-spell-checker"
+        ]
+    }
+}

.devcontainer/post-create.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env sh
+
+# Jekyll does not work on ruby v3.3*
+rvm install "ruby-2.6"
+rvm use
+
+# Install the version of Bundler specified in the Gemfile.lock
+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
+
+bundle exec jekyll serve --force-polling