Feature/devcontainer optimization (#48)

Author: simonkurtz-MSFT

.devcontainer/Dockerfile

@@ -0,0 +1,72 @@
+# https://github.com/devcontainers/images/tree/main/src/python
+
+# syntax=docker/dockerfile:1.4
+
+# Use single-stage build with Python 3.12
+FROM mcr.microsoft.com/devcontainers/python:1-3.12-bookworm
+
+# Set build arguments
+ARG PYTHON_VERSION=3.12
+
+# Set environment variables
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PIP_DISABLE_PIP_VERSION_CHECK=1 \
+    PYTHONPATH=/workspaces/Apim-Samples/shared/python:/workspaces/Apim-Samples \
+    DEBIAN_FRONTEND=noninteractive
+
+# Install system dependencies as root
+USER root
+RUN --mount=type=cache,target=/var/cache/apt \
+    --mount=type=cache,target=/var/lib/apt/lists \
+    apt-get update && \
+    # Remove Python 3.11 and other versions if they exist
+    apt-get remove -y python3.11* python3-minimal python3.11-minimal || true && \
+    apt-get autoremove -y && \
+    # Install essential packages
+    apt-get install -y --no-install-recommends curl wget jq tree git-lfs vim nano htop && \
+    apt-get clean && \
+    # Create symbolic links to ensure python3 points to Python 3.12
+    ln -sf /usr/local/bin/python3.12 /usr/bin/python3 && \
+    ln -sf /usr/local/bin/python3.12 /usr/bin/python && \
+    # Ensure latest pip is installed for Python 3.12
+    /usr/local/bin/python3.12 -m pip install --upgrade pip setuptools wheel
+
+# Switch to vscode user
+USER vscode
+
+# Configure Azure CLI for Codespaces (prebuild optimization)
+RUN az config set core.login_experience_v2=off 2>/dev/null || true && \
+    az extension add --name containerapp --only-show-errors 2>/dev/null || true && \
+    az extension add --name front-door --only-show-errors 2>/dev/null || true
+
+# Configure shell to auto-activate virtual environment
+RUN echo "# Auto-activate APIM Samples virtual environment" >> ~/.bashrc && \
+    echo "if [ -f /workspaces/Apim-Samples/.venv/bin/activate ]; then" >> ~/.bashrc && \
+    echo "    source /workspaces/Apim-Samples/.venv/bin/activate" >> ~/.bashrc && \
+    echo "fi" >> ~/.bashrc && \
+    echo "# Auto-activate APIM Samples virtual environment" >> ~/.zshrc && \
+    echo "if [ -f /workspaces/Apim-Samples/.venv/bin/activate ]; then" >> ~/.zshrc && \
+    echo "    source /workspaces/Apim-Samples/.venv/bin/activate" >> ~/.zshrc && \
+    echo "fi" >> ~/.zshrc && \
+    # Add helpful aliases
+    echo "alias ll='ls -alF'" >> ~/.bashrc && \
+    echo "alias la='ls -A'" >> ~/.bashrc && \
+    echo "alias l='ls -CF'" >> ~/.bashrc && \
+    echo "alias pytest-cov='python -m pytest --cov=. --cov-report=html'" >> ~/.bashrc
+
+# Set final working directory
+WORKDIR /workspaces/Apim-Samples
+
+# Add health check for the virtual environment
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD . /workspaces/Apim-Samples/.venv/bin/activate && python -c "import sys, pip; print(f'Python {sys.version}'); print(f'Pip {pip.__version__}'); import requests, jwt; print('Core packages OK')" || exit 1
+
+# Add labels for maintainability
+LABEL maintainer="APIM Samples Team" \
+      description="Simplified dev container for Azure API Management samples with Codespaces prebuild optimization" \
+      version="2.1" \
+      python.version="3.12" \
+      debian.version="bookworm" \
+      venv.location="/workspaces/Apim-Samples/.venv"