add Codespaces config

.devcontainer/Dockerfile

@@ -0,0 +1,9 @@
+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.202.5/containers/ubuntu/.devcontainer/base.Dockerfile
+
+# [Choice] Ubuntu version (use hirsuite or bionic on local arm64/Apple Silicon): hirsute, focal, bionic
+ARG VARIANT="hirsute"
+FROM mcr.microsoft.com/vscode/devcontainers/base:0-${VARIANT}
+
+# [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>

.devcontainer/devcontainer.json

@@ -0,0 +1,53 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.202.5/containers/ubuntu
+{
+  "name": "Ubuntu",
+  "runArgs": ["--init"],
+  "build": {
+    "dockerfile": "Dockerfile",
+    // Update 'VARIANT' to pick an Ubuntu version: hirsute, focal, bionic
+    // Use hirsute or bionic on local arm64/Apple Silicon.
+    "args": { "VARIANT": "hirsute" }
+  },
+  "features": {
+    "git": "os-provided",
+    "node": "14"
+  },
+
+  // Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+  "remoteUser": "vscode",
+
+  // Use 'postCreateCommand' to run commands after the container is created.
+  "postCreateCommand": "npm i -g vercel",
+  "postAttachCommand": "yarn install --frozen-lockfile",
+
+  // Use 'forwardPorts' to make a list of ports inside the container available locally.
+  "forwardPorts": [1337],
+
+  "portsAttributes": {
+    "1337": {
+      "label": "Webpack"
+    }
+  },
+
+  // Set *default* container specific settings.json values on container create.
+  "settings": {
+    "css.validate": false,
+    "scss.validate": false,
+    "html.format.templating": true,
+    "prettier.requireConfig": true,
+    "prettier.configPath": ".prettierrc",
+    "markdown.preview.lineHeight": 1.75
+  },
+
+  // Add the IDs of extensions you want installed when the container is created.
+  "extensions": [
+    "editorconfig.editorconfig",
+    "budparr.language-hugo-vscode",
+    "dbaeumer.vscode-eslint",
+    "davidanson.vscode-markdownlint",
+    "esbenp.prettier-vscode",
+    "stylelint.vscode-stylelint",
+    "ms-vscode.wordcount"
+  ]
+}

package.json

@@ -19,7 +19,6 @@
     "build": "gulp",
     "clean": "gulp clean",
     "start": "gulp serve",
-    "start:vercel": "volta run --node 14 --npm 6 -- vercel dev",
     "lint": "run-s lint:**",
     "lint:js": "eslint .",
     "lint:css": "stylelint '**/*.{css,scss}'",