From acec12d46a57c348a35b8bf4eb7598894f9db1cd Mon Sep 17 00:00:00 2001
From: Sung <hello@sungwoncho.com>
Date: Sun, 19 Oct 2025 13:44:54 -0700
Subject: [PATCH] Add multi-platform Docker support for ARM64, ARMv7, and 386

---
 .github/workflows/release-server.yml | 12 +++++++++++-
 host/docker/Dockerfile               | 28 +++++++++++++++++++++++-----
 scripts/server/build.sh              |  2 ++
 3 files changed, 36 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/release-server.yml b/.github/workflows/release-server.yml
index f52e1508..a5f52933 100644
--- a/.github/workflows/release-server.yml
+++ b/.github/workflows/release-server.yml
@@ -55,10 +55,19 @@ jobs:
           ./scripts/generate-changelog.sh server "$TAG" "$PREV_TAG" > /tmp/changelog.txt
           cat /tmp/changelog.txt
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Prepare Docker build context
         run: |
           VERSION="${{ steps.version.outputs.version }}"
           cp build/server/dnote_server_${VERSION}_linux_amd64.tar.gz host/docker/
+          cp build/server/dnote_server_${VERSION}_linux_arm64.tar.gz host/docker/
+          cp build/server/dnote_server_${VERSION}_linux_arm.tar.gz host/docker/
+          cp build/server/dnote_server_${VERSION}_linux_386.tar.gz host/docker/
 
       - name: Login to Docker Hub
         uses: docker/login-action@v3
@@ -71,11 +80,12 @@ jobs:
         with:
           context: ./host/docker
           push: true
+          platforms: linux/amd64,linux/arm64,linux/arm/v7,linux/386
           tags: |
             dnote/dnote:${{ steps.version.outputs.version }}
             dnote/dnote:latest
           build-args: |
-            tarballName=dnote_server_${{ steps.version.outputs.version }}_linux_amd64.tar.gz
+            version=${{ steps.version.outputs.version }}
 
       - name: Create GitHub release
         env:
diff --git a/host/docker/Dockerfile b/host/docker/Dockerfile
index 88681591..e67da318 100644
--- a/host/docker/Dockerfile
+++ b/host/docker/Dockerfile
@@ -1,12 +1,30 @@
 FROM busybox:glibc
 
-ARG tarballName
-RUN test -n "$tarballName"
+ARG TARGETPLATFORM
+ARG version
 
-WORKDIR dnote
+RUN test -n "$TARGETPLATFORM" || (echo "TARGETPLATFORM is required" && exit 1)
+RUN test -n "$version" || (echo "version is required" && exit 1)
 
-COPY "$tarballName" .
-RUN tar -xvzf "$tarballName"
+WORKDIR /tmp/tarballs
+
+# Copy all architecture tarballs
+COPY dnote_server_*.tar.gz ./
+
+# Select and extract the correct tarball based on target platform
+RUN case "$TARGETPLATFORM" in \
+      "linux/amd64") ARCH="amd64" ;; \
+      "linux/arm64") ARCH="arm64" ;; \
+      "linux/arm/v7") ARCH="arm" ;; \
+      "linux/386") ARCH="386" ;; \
+      *) echo "Unsupported platform: $TARGETPLATFORM" && exit 1 ;; \
+    esac && \
+    TARBALL="dnote_server_${version}_linux_${ARCH}.tar.gz" && \
+    echo "Extracting $TARBALL for $TARGETPLATFORM" && \
+    mkdir -p /dnote && \
+    tar -xvzf "$TARBALL" -C /dnote
+
+WORKDIR /dnote
 
 COPY entrypoint.sh .
 ENTRYPOINT ["./entrypoint.sh"]
diff --git a/scripts/server/build.sh b/scripts/server/build.sh
index a4e24df5..d625d492 100755
--- a/scripts/server/build.sh
+++ b/scripts/server/build.sh
@@ -74,3 +74,5 @@ go install src.techknowlogick.com/xgo@latest
 
 build linux amd64
 build linux arm64
+build linux arm
+build linux 386