Added support for arm64 builds

.github/workflows/image.yaml

@@ -20,6 +20,9 @@ jobs:
     environment: dev
 
     steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
 
@@ -54,6 +57,7 @@ jobs:
         uses: docker/build-push-action@v4
         with:
           push: true
+          platforms: "linux/amd64,linux/arm64"
           cache-from: |
             type=gha
           cache-to: |
@@ -70,6 +74,9 @@ jobs:
     environment: prod
 
     steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
 
@@ -105,6 +112,7 @@ jobs:
         uses: docker/build-push-action@v4
         with:
           push: true
+          platforms: "linux/amd64,linux/arm64"
           cache-from: |
             type=gha
           cache-to: |

Dockerfile

@@ -3,24 +3,25 @@ ARG FLUTTER_VERSION=3.10.6
 ARG OLM_VERSION=3.2.15
 
 # Building libolm
-FROM nixos/nix AS olm-builder
+# libolm only has amd64
+FROM --platform=linux/amd64 nixos/nix AS olm-builder
 ARG OLM_VERSION
 RUN nix build -v --extra-experimental-features flakes --extra-experimental-features nix-command gitlab:matrix-org/olm/${OLM_VERSION}?host=gitlab.matrix.org\#javascript
 
-# Building Twake web files
-FROM ghcr.io/cirruslabs/flutter:${FLUTTER_VERSION} as web-builder
+# Building Twake for the web
+FROM --platform=linux/amd64 ghcr.io/cirruslabs/flutter:${FLUTTER_VERSION} AS web-builder
 COPY . /app
 WORKDIR /app
-RUN apt update && \
-    apt install openssh-client -y && \
+RUN DEBIAN_FRONTEND=noninteractive apt update && \
+    apt install -y openssh-client && \
     rm -rf assets/js/* && \
     mkdir ~/.ssh && \
     ssh-keyscan github.com >> ~/.ssh/known_hosts
 COPY --from=olm-builder /result/javascript assets/js/package
 RUN --mount=type=ssh,required=true ./scripts/build-web.sh
 
 # Final image
-FROM nginx:alpine
+FROM nginx:alpine AS final-image
 RUN rm -rf /usr/share/nginx/html
 COPY --from=web-builder /app/build/web /usr/share/nginx/html/web/