Since the target is always a Cartesi Machine (riscv64), cartesi build should enforce the docker build environment via --platform argument.

This way Dockerfile from cartesi/application-templates should be something like this.

javascript

#BUILDER
FROM --platform=$BUILDPLATFORM node:20.16.0-bookworm AS build-stage
(...)

#TARGET
FROM cartesi/node:20.16.0-jammy-slim
(...)

We should only need to define --platform when we want to run something on the host platform, for a cross-compilation or build stage that could be faster without the linux/riscv64 qemu of the docker builder.

The example above uses the $BUILDPLATFORM, which is recommended so it will use the host platform.

The second and last FROM doesn't need a --platform since this will be enforced by the cartesi build.