build(devcontainer): use the shared prebuilt image

.devcontainer/devcontainer.json

@@ -1,56 +1,14 @@
 {
-  "name": "NodeIP Discovery DevContainer",
-  "build": {
-    "dockerfile": "Dockerfile"
-  },
-  "features": {
-    "ghcr.io/devcontainers/features/docker-in-docker:3": {
-      "dockerDashComposeVersion": "none",
-      "moby": false
-    },
-    "ghcr.io/devcontainers/features/github-cli:1": {},
-    "ghcr.io/devcontainers/features/git:1": {}
-  },
-
+  "name": "NodeIP Discovery",
+  // Tools, features and shared settings come from the image.
+  // See https://github.com/scality/devcontainers
+  "image": "ghcr.io/scality/devcontainers/go-k8s:pr-1@sha256:daaa2f191f209e4890313562294e374c950c706c0976da0d92f0d64c593861e7",
   "customizations": {
     "vscode": {
-      "settings": {
-        "telemetry.telemetryLevel": "off",
-        "redhat.telemetry.enabled": false,
-        "editor.renderWhitespace": "all",
-        "terminal.integrated.profiles.linux": {
-          "zsh": {
-            "path": "/usr/bin/zsh"
-          }
-        },
-        "terminal.integrated.defaultProfile.linux": "zsh",
-        "python.terminal.activateEnvironment": false
-      },
       "extensions": [
-        //Kubernetes support
-        "ms-kubernetes-tools.vscode-kubernetes-tools",
-        //Create TODO and FIXME tree
-        "Gruntfuggly.todo-tree",
-        //Go support
-        "golang.go",
-        //Remote container support
-        "ms-vscode-remote.remote-containers",
-        //YAML support
-        "redhat.vscode-yaml",
-        //Github Action helper
-        "github.vscode-github-actions",
-        //Docker helper
-        "ms-azuretools.vscode-docker",
-        //Gherkin support and helper
-        "CucumberOpen.cucumber-official",
-        //Mardown support
-        "yzhang.markdown-all-in-one",
-        //Compare text selections
-        "ryu1kn.partial-diff",
-        //Ginko support
-        "joselitofilho.ginkgotestexplorer"
+        // Gherkin support and helper
+        "CucumberOpen.cucumber-official"
       ]
     }
-  },
-  "remoteUser": "vscode"
+  }
 }

CONTRIBUTING.md

@@ -13,6 +13,8 @@ its architecture see [DESIGN.md](DESIGN.md).
 A ready-to-use [dev container](.devcontainer/) is provided with the Go toolchain,
 Docker-in-Docker, and the recommended VS Code extensions. Opening the repository
 in a supporting editor is the quickest way to get a consistent environment.
+It uses a prebuilt image from [scality/devcontainers](https://github.com/scality/devcontainers).
+The image is private: log in to `ghcr.io` once, as described in that repository's README.
 
 Everyday commands: