feat: add arm64 Docker image support (closes #44)

Add QEMU and multi-platform build (linux/amd64 + linux/arm64) to
GitHub Actions workflow, enabling self-hosting on Raspberry Pi and
other ARM64 devices.

.github/workflows/docker-publish.yml

@@ -40,6 +40,9 @@ jobs:
             type=semver,pattern={{major}}.{{minor}}
             type=sha
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -47,6 +50,7 @@ jobs:
         uses: docker/build-push-action@v6
         with:
           context: .
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.19.3] - 2026-04-14
+
+### Added
+- Docker: multi-architecture image support (linux/amd64 + linux/arm64) - enables self-hosting on Raspberry Pi and other ARM64 devices (closes #44)
+
 ## [0.19.2] - 2026-04-14
 
 ### Improved

package.json

@@ -1,6 +1,6 @@
 {
   "name": "oikos",
-  "version": "0.19.2",
+  "version": "0.19.3",
   "description": "Self-hosted family planner - calendar, tasks, shopping, meal planning, budget and more. Private, open-source, no subscription.",
   "main": "server/index.js",
   "type": "module",