Add devcontainer configuration

.devcontainer/devcontainer.json

@@ -0,0 +1,19 @@
+{
+    "name": "Development container for STM32",
+    "build": {
+        "dockerfile": "Dockerfile"
+    },
+    "workspaceFolder": "/workspace",
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "ms-vscode.cmake-tools",
+                "ms-vscode.cpptools"
+            ]
+        }
+    },
+    "mounts": [
+        "source=${localWorkspaceFolder},target=/workspace,type=bind"
+    ],
+    "postCreateCommand": "echo 'Dev environment ready!'"
+}

Dockerfile

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+# Use a lightweight base image
+FROM ubuntu:20.04
+
+# Set environment variables for non-interactive installation
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Update and install required packages
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    software-properties-common \
+    wget \
+    git \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# Download and install arm-none-eabi-gcc
+RUN wget -qO- https://developer.arm.com/-/media/Files/downloads/gnu-rm/12.2.rel1/gcc-arm-none-eabi-12.2.rel1-x86_64-linux.tar.bz2 \
+    | tar -xj -C /opt/ \
+    && ln -s /opt/gcc-arm-none-eabi-12.2.rel1/bin/* /usr/local/bin/
+
+# Verify installation
+RUN arm-none-eabi-gcc --version
+
+# Set the working directory inside the container
+WORKDIR /workspace
+
+# Default command for the container
+CMD ["bash"]