ci(gh): add .devcontainer for GitHub Codespaces

.devcontainer/Dockerfile

@@ -0,0 +1,5 @@
+ARG VARIANT="16-bullseye"
+
+FROM mcr.microsoft.com/vscode/devcontainers/javascript-node:0-${VARIANT}
+
+RUN curl -f https://get.pnpm.io/v6.16.js | node - add --global pnpm

.devcontainer/devcontainer.json

@@ -0,0 +1,23 @@
+{
+  "name": "Node.js",
+
+  "build": {
+    "dockerfile": "Dockerfile",
+    "args": { "VARIANT": "16-bullseye" }
+  },
+
+  // 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": ["dbaeumer.vscode-eslint", "esbenp.prettier-vscode", "lokalise.i18n-ally"],
+
+  // Use 'forwardPorts' to make a list of ports inside the container available locally.
+  "forwardPorts": [3000, 3100, 3200, 5432],
+
+  // Use 'postCreateCommand' to run commands after the container is created.
+  "postCreateCommand": "pnpm install",
+
+  // Comment out to connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+  "remoteUser": "node"
+}