Image build is optimized.

flask_ml_api/Dockerfile

@@ -2,10 +2,10 @@
 FROM python:3.10-slim AS builder
 
 # Install system dependencies
-RUN apk add --no-cache \
-    build-base \
-    python3-dev \
-    py3-virtualenv
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    python3-venv \
+    && rm -rf /var/lib/apt/lists/*
 
 # Create and activate virtual environment
 RUN python3 -m venv /opt/myenv