Add support for amd64 docker images

.github/workflows/amd64-debian.yml

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+name: AMD64 Debian
+
+on:
+  # run every day of the week at 02:00
+  schedule:
+    - cron: 0 2 * * *
+  workflow_dispatch:
+
+jobs:
+ build-amd64-debian-docker:
+  name: Build for AMD64 on Docker (Debian slim)
+  runs-on: ubuntu-24.04
+  steps:
+    - name: Check Docker and Docker Compose versions
+      run: |
+        docker --version
+        docker compose version
+
+    - uses: actions/checkout@v2
+
+    - name: AMD64 Debian build
+      run: |
+        docker build -f Dockerfile.debian -t htm-amd64-debian-docker --build-arg arch=amd64 .
+
+    - name: Tests
+      run: |
+        docker run htm-amd64-debian-docker python htm_test.py
+
+    - name: Login to GitHub Container Registry
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Tag and push Docker image
+      run: |
+        docker tag htm-amd64-debian-docker ghcr.io/${{ github.repository }}/htm-amd64-debian:latest
+        docker tag htm-amd64-debian-docker ghcr.io/${{ github.repository }}/htm-amd64-debian:${{ github.run_number }}
+        docker tag htm-amd64-debian-docker ghcr.io/${{ github.repository }}/htm-amd64-debian:${{ github.sha }}
+        docker push ghcr.io/${{ github.repository }}/htm-amd64-debian:latest
+        docker push ghcr.io/${{ github.repository }}/htm-amd64-debian:${{ github.run_number }}
+        docker push ghcr.io/${{ github.repository }}/htm-amd64-debian:${{ github.sha }}

.github/workflows/amd64.yml

@@ -0,0 +1,43 @@
+name: AMD64
+
+on:
+  # run every day of the week at 02:00
+  schedule:
+    - cron: 0 2 * * *
+  workflow_dispatch:
+
+jobs:
+ build-amd64-docker:
+  name: Build for AMD64 on Docker
+  runs-on: ubuntu-24.04
+  steps:
+    - name: Check Docker and Docker Compose versions
+      run: |
+        docker --version
+        docker compose version
+
+    - uses: actions/checkout@v2
+
+    - name: AMD64 build
+      run: |
+        docker build -t htm-amd64-docker --build-arg arch=amd64 .
+
+    - name: Tests
+      run: |
+        docker run htm-amd64-docker python htm_test.py
+
+    - name: Login to GitHub Container Registry
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Tag and push Docker image
+      run: |
+        docker tag htm-amd64-docker ghcr.io/${{ github.repository }}/htm-amd64:latest
+        docker tag htm-amd64-docker ghcr.io/${{ github.repository }}/htm-amd64:${{ github.run_number }}
+        docker tag htm-amd64-docker ghcr.io/${{ github.repository }}/htm-amd64:${{ github.sha }}
+        docker push ghcr.io/${{ github.repository }}/htm-amd64:latest
+        docker push ghcr.io/${{ github.repository }}/htm-amd64:${{ github.run_number }}
+        docker push ghcr.io/${{ github.repository }}/htm-amd64:${{ github.sha }}

Dockerfile.debian

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+## Debian slim variant of the htm.core Docker image.
+##
+## Produces a glibc-based image where manylinux wheels (nautilus-trader,
+## numpy, scipy, etc.) install from pre-built binaries without needing
+## clang, rust, or other compilers at CI time.
+##
+## Build:
+##   docker build -f Dockerfile.debian -t htm-amd64-debian --build-arg arch=amd64 .
+##
+## The Alpine Dockerfile remains the default for arm64 and other uses.
+
+ARG arch=amd64
+
+## Stage 0: cross-compile bootstrap (only needed when target != host)
+FROM multiarch/qemu-user-static AS bootstrap
+ARG arch
+LABEL org.opencontainers.image.description="Docker image with a pre-built, tested and packaged community maintained htm.core library"
+LABEL org.opencontainers.image.source="https://github.com/htm-community/htm.core"
+
+## Stage 1: build htm.core on the target platform
+FROM --platform=linux/${arch} python:3.13-slim AS build
+ARG arch
+RUN echo "Building HTM for ${arch}" && uname -a
+
+ADD . /usr/local/src/htm.core
+WORKDIR /usr/local/src/htm.core
+
+# Install build dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+  cmake \
+  make \
+  g++ \
+  git \
+  && rm -rf /var/lib/apt/lists/*
+
+# Set environment variable to indicate we're in Docker (for htm_install.py)
+ENV DOCKER_CONTAINER=1
+
+# Run the htm_install.py script to build and extract build artifacts
+RUN python htm_install.py