refactor: update devcontainer to use template's pre-built image (#144)

Author: fx

.devcontainer/devcontainer.json

@@ -1,13 +1,12 @@
 {
   "name": "template",
-  "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
-  "features": {
-    "ghcr.io/devcontainers/features/docker-in-docker:2": {},
-    "ghcr.io/devcontainers-extra/features/mise:1": {},
-    "ghcr.io/devcontainers/features/node:1": {
-      "version": "lts"
-    }
-  },
+  "image": "ghcr.io/fx/docker/devcontainer:latest",
   "containerUser": "vscode",
-  "postCreateCommand": "bash .devcontainer/install-deps.sh"
+  "postStartCommand": "bash .devcontainer/post-start-wrapper.sh",
+  "mounts": [
+    "source=/var/run/docker.sock,target=/var/run/docker.sock,type=bind"
+  ],
+  "runArgs": [
+    "--privileged"
+  ]
 }

.devcontainer/install-deps.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+set -e
+
+# Log script execution for debugging
+echo "Running post-start script: $(date)" >> /tmp/post-start.log
+exec > >(tee -a /tmp/post-start.log)
+exec 2>&1
+
+bash .devcontainer/post-start.sh

.devcontainer/post-start-wrapper.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+set -e
+
+# Trust the workspace folder
+mise trust
+
+# Install tools via mise
+echo "Installing tools via mise..."
+mise install -y
+
+# Install Claude Code globally
+echo "Installing Claude Code..."
+npm install -g @anthropic-ai/claude-code
+
+# Install npm dependencies if package.json exists
+if [ -f "package.json" ]; then
+  echo "Installing npm dependencies..."
+  npm install
+fi
+
+echo "Post-start script completed successfully"