Add QEMU setup to Docker workflow and update Dockerfile deps

Introduces the docker/setup-qemu-action step in the GitHub Actions workflow to support multi-architecture builds. Also updates the lthn-chain Dockerfile to include autotools-dev and checkinstall in the build dependencies.

.github/workflows/build-docker.yml

@@ -44,15 +44,18 @@ jobs:
           fetch-depth: 0
           submodules: recursive
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
       - name: Login to DockerHub
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Build ${{ matrix.platform }}
         id: docker_build
         continue-on-error: true
@@ -81,15 +84,18 @@ jobs:
           fetch-depth: 0
           submodules: recursive
 
-      - name: Set up Buildx
-        uses: docker/setup-buildx-action@v3
-
       - name: Login to DockerHub
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Build
         id: docker_final
         uses: docker/build-push-action@v6

utils/docker/images/lthn-chain/Dockerfile

@@ -21,7 +21,7 @@ ENV BUILD_TARGET=${BUILD_TARGET}
 RUN apt update && apt -y upgrade
 
 RUN apt install -y build-essential pkgconf \
-    curl ca-certificates bison \
+    curl ca-certificates bison autotools-dev checkinstall \
     g++ llvm clang lld cmake \
     git python3 python3-pip xz-utils gperf