Create Dockerfile

Dockerfile

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+# syntax=docker/dockerfile:1
+# BuildKit optimized Dockerfile with advanced caching and multi-arch support
+
+ARG TARGETPLATFORM
+ARG BUILDPLATFORM
+ARG TARGETOS
+ARG TARGETARCH
+
+# Stage 1: Dependencies stage with cache mounts
+FROM --platform=$BUILDPLATFORM python:3.11-slim AS dependencies
+
+WORKDIR /app
+
+# Use cache mount for apt packages
+RUN --mount=type=cache,target=/var/cache/apt \
+    --mount=type=cache,target=/var/lib/apt \
+    apt-get update && apt-get install -y \
+    gcc \
+    python3-dev
+
+# Use cache mount for pip packages
+COPY requirements.txt .
+RUN --mount=type=cache,target=/root/.cache/pip \
+    pip install --user -r requirements.txt
+
+# Stage 2: Model training stage
+FROM dependencies AS trainer
+
+COPY train.py .
+
+# Train the model with cache mount for any downloads
+RUN --mount=type=cache,target=/tmp \
+    python train.py
+
+# Stage 3: Final production stage
+FROM --platform=$TARGETPLATFORM python:3.11-slim AS production
+
+# Display build info for debugging
+RUN echo "Building for platform: $TARGETPLATFORM, architecture: $TARGETARCH"
+
+# Create non-root user
+RUN useradd --create-home --shell /bin/bash mluser
+
+WORKDIR /app
+
+# Copy Python packages from dependencies stage
+COPY --from=dependencies /root/.local /home/mluser/.local
+
+# Copy application files
+COPY app.py .
+COPY requirements.txt .
+
+# Copy trained models from trainer stage
+COPY --from=trainer /app/*.pkl ./
+
+# Set proper ownership
+RUN chown -R mluser:mluser /app
+USER mluser
+
+# Update PATH for user-installed packages
+ENV PATH=/home/mluser/.local/bin:$PATH
+
+# Health check with improved reliability
+HEALTHCHECK --interval=30s --timeout=10s --start-period=15s --retries=3 \
+    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:7860', timeout=5)" || exit 1
+
+EXPOSE 7860
+
+CMD ["python", "app.py"]
+```
+
+### Step 3: Build for Multiple Platforms
+
+```
+# Build for single platform and load locally
+docker buildx build \
+  --platform linux/amd64 \
+  -t tech-stack-advisor:multiarch \
+  --load .
+
+# Login to Registrt to be able to push image 
+docker login 
+
+# For multiple architectures (requires registry push)
+# replace xxxxxx with your Dockerhub Username or equivalent
+docker buildx build \
+   --platform linux/amd64,linux/arm64 \
+   -t xxxxxx/tech-stack-advisor:multiarch \
+   --push .