Request for Multi-Arch Docker Image (Including ARM Support)

[dennysubke]

Request for Multi-Arch Docker Image (Including ARM Support)

Description

Hi Threema Team,

First of all, thank you for your great work on Threema Web!

I noticed that the official Docker image on Docker Hub is currently only available for amd64. It would be extremely helpful if a multi-arch image could be provided, including support for arm64 (and ideally arm/v7).

Why is Multi-Arch Important?

1. Raspberry Pi & ARM Servers Are Becoming More Popular
   Many users, especially home server enthusiasts and small businesses, rely on energy-efficient ARM devices such as the Raspberry Pi or ARM-based servers (e.g., Ampere Altra or AWS Graviton). A multi-arch image would allow Threema Web to run on these devices without requiring manual adjustments.

2. Cross-Platform Support Makes Deployment Easier
   Providing a multi-arch image ensures that Threema Web can be deployed seamlessly across a variety of environments—whether on a traditional x86 server or an ARM-based home server.

3. Docker Natively Supports Multi-Arch Builds
   With BuildKit and docker buildx, creating and publishing multi-arch images has become easier than ever. The additional effort required to enable multi-arch support is relatively small.

4. Future-Proofing
   The industry is shifting more and more towards ARM architectures—whether through the success of Apple’s M1/M2/M3 chips or the increasing adoption of ARM in data centers. A multi-arch image would make Threema Web more accessible in the long run.

Proposed Solution

If you’re not already using docker buildx, modifying the CI/CD pipeline could help generate a multi-arch image. A simple example of a multi-arch build using docker buildx would be:

docker buildx create --use
docker buildx build --platform linux/amd64,linux/arm64,linux/arm/v7 -t threema/threema-web:latest --push .

Alternatively, a community-friendly approach could be optimizing the Dockerfile so that users can easily build for ARM platforms themselves if an official multi-arch image is not feasible at the moment.

I (along with many other ARM users) would greatly appreciate it if you could consider this improvement!

Thank you! 😎