feat(devcontainer): add initial devcontainer configuration for Ubuntu environment

Author: dgibbs64

.devcontainer/devcontainer.json

@@ -0,0 +1,21 @@
+{
+  "name": "Ubuntu",
+  "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
+  "features": {
+    "ghcr.io/devcontainers-extra/features/prettier:1": {},
+    "ghcr.io/devcontainers-extra/features/shellcheck:1": {}
+  },
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "editorconfig.editorconfig",
+        "esbenp.prettier-vscode",
+        "ms-python.python",
+        "redhat.vscode-yaml",
+        "timonwong.shellcheck",
+        "yzhang.markdown-all-in-one"
+      ]
+    }
+  },
+  "postCreateCommand": "npm install --save-dev prettier-plugin-sh"
+}