chore: update and optimize Dockerfile by adding layers

Author: lpm0073

Dockerfile

@@ -1,23 +1,49 @@
 # Use the official Python 3.9 image from the Docker Hub.
 # This runs on Debian Linux.
-FROM python:3.9-slim
+FROM --platform=linux/amd64 python:3.9 AS base
+
+############################## systempackages #################################
+FROM base AS systempackages
+
+COPY requirements/base.txt base.txt
+COPY requirements/prod.txt requirements.txt
+
+# Install any needed packages specified in requirements.txt
+# Install Azure CLI and any needed packages specified in requirements.txt
+RUN apt-get update && \
+    apt-get install -y curl gnupg lsb-release && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN curl -sL https://aka.ms/InstallAzureCLIDeb | bash
+
+# dotnet runtime installation - using official Microsoft install script
+RUN curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin --channel 6.0 --runtime dotnet --install-dir /usr/share/dotnet && \
+    ln -s /usr/share/dotnet/dotnet /usr/local/bin/dotnet
+
+############################## python virtual environment #################################
+FROM systempackages AS venv
+
+RUN pip install --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
+
+
+############################## app #################################
+FROM venv AS app
 
 # Set the working directory /dist
 WORKDIR /dist
 
 # Copy the current directory contents into the container at /app
 COPY azure_ai /dist/azure_ai
-COPY requirements/base.txt base.txt
-COPY requirements/prod.txt requirements.txt
 
 # Set environment variables
 ENV ENVIRONMENT=dev
 ENV PYTHONPATH=/dist
 
-# Install any needed packages specified in requirements.txt
-RUN pip install --upgrade pip && \
-    pip install --no-cache-dir -r requirements.txt
 
 
+################################# final #######################################
+FROM app AS final
 # Run the application when the container launches
-CMD ["python", "azure_ai/automated_ml.py"]
+CMD ["python", "azure_ai/commands/workspace.py"]