⚡️(docker) build frontend assets natively for arm64 images

Release images were building the JS bundles under QEMU for arm64, which
took most of the 10 to 17 minutes spent on each frontend image on CI.

Since the output is mostly static files, we can use the build platform
for the multi stage build steps of frontend images and share them
between architectures.

CHANGELOG.md

@@ -14,6 +14,7 @@ and this project adheres to
 - ✨(frontend) replace the Crisp chat with the La Suite support form
 - 🔒️(frontend) keep rooms out of search engine and AI indexes
 - ⬆️(backend) upgrade django-lasuite to v1.0.0
+- ⚡️(docker) build frontend assets natively for arm64 images
 
 ## [1.36.3] - 2026-10-23
 

docker/dinum-frontend/Dockerfile

@@ -1,5 +1,5 @@
 # ---- Front-end image ----
-FROM node:22.23.4-alpine AS frontend-deps
+FROM --platform=$BUILDPLATFORM node:22.23.4-alpine AS frontend-deps
 
 RUN apk upgrade --no-cache ca-certificates
 
@@ -41,7 +41,7 @@ COPY ./docker/dinum-frontend/fonts/ \
     ./dist/assets/fonts/
 
 # ---- Addons builder image ----
-FROM node:22.23.4-alpine AS addons-builder
+FROM --platform=$BUILDPLATFORM node:22.23.4-alpine AS addons-builder
 
 RUN apk upgrade --no-cache ca-certificates
 

src/frontend/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:22.23.4-alpine AS frontend-deps
+FROM --platform=$BUILDPLATFORM node:22.23.4-alpine AS frontend-deps
 
 RUN apk upgrade --no-cache ca-certificates