fix local build

Signed-off-by: Ronni Skansing <rskansing@gmail.com>

backend/build_scripts/build.sh

@@ -1,32 +1,76 @@
 #!/bin/sh
-echo "### Building frontend"
-# remove any old builds
-rm -rf phishingclub/frontend/frontend/build
-mkdir -p phishingclub/frontend/frontend/build
+set -e
 
-sudo docker run --rm \
--v "$(pwd)":/app \
--w /app/phishingclub/frontend \
-node:22-alpine \
-sh -c "npm ci && npm run build-production"
+# build a single, self contained binary with the frontend embedded
+# uses docker only, no host go or node toolchain is needed
+# output is build/phishingclub at the repo root
+#
+# this mirrors .github/workflows/release.yml: same pinned images, same
+# musl static cgo build. pinning the images is what keeps the frontend
+# build reproducible, a floating node tag pulls a newer node that can
+# run out of heap on the production bundle.
+#
+# defaults to linux amd64, override the arch with:
+#   BIN_ARCH=arm64 ./backend/build_scripts/build.sh   (needs qemu locally)
+# override the version string (defaults to git describe) with:
+#   VERSION=1.2.3 ./backend/build_scripts/build.sh
+
+# pinned images, keep in sync with .github/workflows/release.yml
+NODE_IMAGE="node@sha256:968df39aedcea65eeb078fb336ed7191baf48f972b4479711397108be0966920" # node:22-alpine
+GO_IMAGE_AMD64="golang@sha256:c4ea15b4a7912716eb362a022e2b12317762eca387423760bc59c0f9ae69423c" # golang:1.25.10-alpine linux/amd64
+GO_IMAGE_ARM64="golang@sha256:5331adf7f8a0803631d9dc28843e288874789c14b97a3d0b54ed13e59f9e0589" # golang:1.25.10-alpine linux/arm64
+
+# resolve the repo root from this script location so it works from any cwd
+SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
+REPO_ROOT=$(cd "$SCRIPT_DIR/../.." && pwd)
+cd "$REPO_ROOT"
 
-# Get current user and group IDs
 USER_ID=$(id -u)
 GROUP_ID=$(id -g)
-
-sudo chown -R $USER_ID:$GROUP_ID phishingclub/frontend/build
-sudo mv phishingclub/frontend/build ./phishingclub/frontend/frontend/
-
-echo "### Building backend"
 HASH=$(git rev-parse --short HEAD)
-echo "Building with hash: $HASH"
+VERSION=${VERSION:-$(git describe --tags --always --dirty 2>/dev/null || echo dev)}
+BIN_ARCH=${BIN_ARCH:-amd64}
 
+case "$BIN_ARCH" in
+	amd64) GO_IMAGE="$GO_IMAGE_AMD64"; PLATFORM="" ;;
+	arm64) GO_IMAGE="$GO_IMAGE_ARM64"; PLATFORM="--platform linux/arm64" ;;
+	*) echo "unsupported BIN_ARCH=$BIN_ARCH (use amd64 or arm64)"; exit 1 ;;
+esac
 
-echo "building..."
+echo "### Building frontend"
+# remove any old builds so nothing stale gets embedded
+rm -rf frontend/build backend/frontend/build
+
+# NODE_OPTIONS only raises the heap ceiling, it does not change the output
+# bundle. the production build can peak above node's 2gb default on machines
+# with many cores (more parallel transforms in flight), where the small CI
+# runner stays under it.
 sudo docker run --rm \
--v "$(pwd)":/app \
--w /app/phishingclub/frontend \
-golang:1.25.10-alpine \
-go build -trimpath \
--ldflags="-X github.com/phishingclub/phishingclub/version.hash=ph$HASH" \
--tags production -o ../build/phishingclub main.go
+	-e NODE_OPTIONS=--max-old-space-size=4096 \
+	-v "$REPO_ROOT/frontend":/app \
+	-w /app \
+	"$NODE_IMAGE" \
+	sh -c "npm ci && npm run build-production"
+
+# place the compiled frontend where the go binary embeds it
+# (backend/frontend/frontend.go does //go:embed build/*)
+mkdir -p backend/frontend/build
+cp -r frontend/build/* backend/frontend/build/
+
+echo "### Building binary for linux/$BIN_ARCH (version $VERSION, hash ph$HASH)"
+mkdir -p build
+
+# cgo build statically linked against musl, matches the release binary
+sudo docker run --rm $PLATFORM \
+	-v "$REPO_ROOT":/app \
+	-w /app/backend \
+	"$GO_IMAGE" \
+	sh -c "apk add --no-cache gcc musl-dev && go build -trimpath \
+		-ldflags='-X github.com/phishingclub/phishingclub/version.hash=ph$HASH -X github.com/phishingclub/phishingclub/version.version=$VERSION -linkmode=external -extldflags=-static' \
+		-tags production -o /app/build/phishingclub main.go"
+
+# the containers run as root, hand the build outputs back to the caller
+sudo chown -R "$USER_ID:$GROUP_ID" build frontend/build frontend/node_modules backend/frontend/build
+
+echo "### Done"
+ls -lh "$REPO_ROOT/build/phishingclub"

makefile

@@ -6,6 +6,10 @@ down:
 	-sudo docker compose down --remove-orphans
 up-build:
 	sudo docker compose up --build --force
+# build a single, self contained binary with the frontend embedded -> build/phishingclub
+# override arch: make build BIN_ARCH=arm64 ; override version: make build VERSION=1.2.3
+build:
+	BIN_ARCH=$(BIN_ARCH) VERSION=$(VERSION) ./backend/build_scripts/build.sh
 # same as up but for machines with limited memory, the frontend waits for the backend
 # build to finish so the two heavy first build steps do not run at the same time
 up-low-mem: