feat: speed up docker build

CHANGELOG.md

@@ -9,6 +9,7 @@
 	- You may need to run `chown -R 65532:65532 <host_path>` on your data directory to ensure the container can write to it.
 - Removing a Split DNS record will no longer make the split domain unresolvable by clients (closes [#231](https://github.com/tale/headplane/issues/231)).
 - Reintroduce the toggle for overriding local DNS settings in the Headscale config (closes [#236](https://github.com/tale/headplane/issues/236)).
+- Prefer cross-compiling in the Dockerfile to speed up builds while still supporting multiple architectures.
 
 ### 0.6.0 (May 25, 2025)
 - Headplane 0.6.0 now requires **Headscale 0.26.0** or newer.

Dockerfile

@@ -1,17 +1,23 @@
-FROM jdxcode/mise:latest AS mise-context
+FROM --platform=$BUILDPLATFORM jdxcode/mise:latest AS mise-context
 COPY mise.toml .
 RUN mise install
 
-FROM mise-context AS go-build
+FROM --platform=$BUILDPLATFORM mise-context AS go-build
 WORKDIR /build/
 
 COPY go.mod go.sum ./
 COPY cmd/ ./cmd/
 COPY internal/ ./internal/
-RUN mkdir -p /build/app/ && mise run wasm ::: agent
+
+ARG TARGETOS
+ARG TARGETARCH
+RUN mkdir -p /build/app/ && \
+	GOOS=$TARGETOS GOARCH=$TARGETARCH CGO_ENABLED=0 \
+	mise run wasm ::: agent
+
 RUN chmod +x /build/build/hp_agent
 
-FROM mise-context AS js-build
+FROM --platform=$BUILDPLATFORM mise-context AS js-build
 WORKDIR /build
 COPY patches ./patches
 COPY package.json pnpm-lock.yaml ./

package.json

@@ -85,6 +85,10 @@
 		"patchedDependencies": {
 			"react-router-hono-server": "patches/react-router-hono-server.patch"
 		},
+		"supportedArchitectures": {
+			"os": ["current", "linux"],
+			"cpu": ["x64", "arm64"]
+		},
 		"onlyBuiltDependencies": [
 			"@biomejs/biome",
 			"better-sqlite3",