Updated devcontainer definition

.devcontainer/Dockerfile

@@ -0,0 +1,24 @@
+FROM mcr.microsoft.com/devcontainers/cpp:1-debian
+
+RUN <<EOT
+apt-get update
+# Install required build tools and external libraries
+apt-get --yes install --no-install-recommends \
+    build-essential \
+    cmake \
+    curl \
+    gfortran \
+    git \
+    libatomic1 \
+    m4 \
+    perl \
+    pkg-config \
+    python3 \
+    wget
+# Install additional packages
+apt-get --yes install --no-install-recommends \
+    ccache \
+    clang \
+    clang-format
+rm -rf /var/lib/apt/lists/*
+EOT

.devcontainer/devcontainer.json

@@ -1,12 +1,18 @@
-{
-  "image": "docker.io/library/julia:latest",
-  "customizations": {
-      "vscode": {
-        "extensions": [
-          "julialang.language-julia",
-          "ms-vscode.cpptools"
-        ]
-     }
-  },
-  "onCreateCommand": "apt-get update && apt-get install -y build-essential libatomic1 python3 gfortran perl wget m4 cmake pkg-config git"
-}
+{
+  "build": {
+    "dockerfile": "Dockerfile"
+  },
+  "features": {
+    "ghcr.io/julialang/devcontainer-features/julia:1": {
+      "channel": "release"
+    }
+  },
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "ms-vscode.cpptools-extension-pack",
+        "ms-vscode.makefile-tools"
+      ]
+    }
+  }
+}