Add ARM (arm64) support for multi-arch Docker image builds

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: dstengle

.devcontainer/Dockerfile

@@ -1,12 +1,19 @@
 FROM mcr.microsoft.com/devcontainers/python:3-3.14-trixie
-# Install 
+# Install
 RUN apt-get update && apt-get install -y git vim curl tmux wget
 RUN pip install uv
-RUN cd /tmp && \
-curl -LO https://github.com/specstoryai/getspecstory/releases/latest/download/SpecStoryCLI_Linux_x86_64.tar.gz && \
-tar -xzf SpecStoryCLI_Linux_x86_64.tar.gz && \
-mv specstory /usr/local/bin/ && chmod +x /usr/local/bin/specstory
+RUN ARCH=$(uname -m) && \
+    if [ "$ARCH" = "aarch64" ]; then SPEC_ARCH="Linux_arm64"; else SPEC_ARCH="Linux_x86_64"; fi && \
+    cd /tmp && \
+    curl -LO "https://github.com/specstoryai/getspecstory/releases/latest/download/SpecStoryCLI_${SPEC_ARCH}.tar.gz" && \
+    tar -xzf "SpecStoryCLI_${SPEC_ARCH}.tar.gz" && \
+    mv specstory /usr/local/bin/ && chmod +x /usr/local/bin/specstory
 RUN curl -fsSL https://claude.ai/install.sh | sudo -u vscode bash
-RUN curl -fsSL https://raw.githubusercontent.com/steveyegge/beads/main/scripts/install.sh | bash && ln -s /usr/lib/x86_64-linux-gnu/libicui18n.so /usr/lib/x86_64-linux-gnu/libicui18n.so.74
-RUN cd /tmp && curl -L -o temporal.tar.gz "https://temporal.download/cli/archive/latest?platform=linux&arch=amd64" && \
-tar -xzf temporal.tar.gz && mv temporal /usr/local/bin/ && chmod +x /usr/local/bin/temporal
+RUN ARCH=$(uname -m) && \
+    if [ "$ARCH" = "aarch64" ]; then LIB_DIR="aarch64-linux-gnu"; else LIB_DIR="x86_64-linux-gnu"; fi && \
+    curl -fsSL https://raw.githubusercontent.com/steveyegge/beads/main/scripts/install.sh | bash && \
+    ln -s /usr/lib/${LIB_DIR}/libicui18n.so /usr/lib/${LIB_DIR}/libicui18n.so.74
+RUN ARCH=$(uname -m) && \
+    if [ "$ARCH" = "aarch64" ]; then TEMPORAL_ARCH="arm64"; else TEMPORAL_ARCH="amd64"; fi && \
+    cd /tmp && curl -L -o temporal.tar.gz "https://temporal.download/cli/archive/latest?platform=linux&arch=${TEMPORAL_ARCH}" && \
+    tar -xzf temporal.tar.gz && mv temporal /usr/local/bin/ && chmod +x /usr/local/bin/temporal

.github/workflows/build-and-publish.yml

@@ -23,6 +23,9 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -52,4 +55,4 @@ jobs:
 
       - name: Build and push container image
         run: |
-          devcontainer build --workspace-folder . --image-name ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }} --push
+          devcontainer build --workspace-folder . --image-name ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }} --platform linux/amd64,linux/arm64 --push