fixing broken puppeteer providers in docker caused by alpine chromium 146 crashing / switched to debian slim with puppeteer's own chrome for testing / dropped 2-stage build / run as non-root / purge build tools after install, improve docker-test.sh to verify it all works. That's it. ;)

docker-test.sh

@@ -7,12 +7,63 @@ if [ "$(docker ps -aq -f name=fredy)" ]; then
   docker rm fredy || true
 fi
 
+# On Apple Silicon, force linux/amd64 to match production CI and avoid arm64/x86_64
+# Chrome mismatch under Rosetta. On native Linux (amd64 or arm64) let Docker pick naturally. That took me fucking 1 hour to figure out.
+PLATFORM=""
+if [ "$(uname -m)" = "arm64" ] && [ "$(uname -s)" = "Darwin" ]; then
+  PLATFORM="linux/amd64"
+fi
+
 # Build image from local Dockerfile, forcing a fresh build without cache
-docker build --no-cache -t fredy:local .
+if [ -n "$PLATFORM" ]; then
+  docker build --no-cache --platform "$PLATFORM" -t fredy:local .
+else
+  docker build --no-cache -t fredy:local .
+fi
 
 # Run container with volumes and port mapping
-docker run -d --name fredy \
-  -v fredy_conf:/conf \
-  -v fredy_db:/db \
-  -p 9998:9998 \
-  fredy:local
+if [ -n "$PLATFORM" ]; then
+  docker run -d --name fredy --platform "$PLATFORM" -v fredy_conf:/conf -v fredy_db:/db -p 9998:9998 fredy:local
+else
+  docker run -d --name fredy -v fredy_conf:/conf -v fredy_db:/db -p 9998:9998 fredy:local
+fi
+
+echo "Waiting for app to be ready..."
+for i in $(seq 1 30); do
+  if docker exec fredy curl -sf http://localhost:9998/ > /dev/null 2>&1; then
+    echo "App is up"
+    break
+  fi
+  if [ "$i" = "30" ]; then
+    echo "App did not come up in time"
+    docker logs fredy
+    exit 1
+  fi
+  sleep 2
+done
+
+# Verify the process is NOT running as root
+RUNNING_USER=$(docker exec fredy id -u)
+if [ "$RUNNING_USER" = "0" ]; then
+  echo "Process is running as root!"
+  exit 1
+fi
+echo "Process runs as UID $RUNNING_USER (not root)"
+
+# Verify Chrome launches without crashing
+echo "Testing Chrome..."
+CHROME=$(docker exec fredy find /home/node/.cache/puppeteer -name chrome -type f 2>/dev/null | head -1)
+if [ -z "$CHROME" ]; then
+  echo "Chrome binary not found"
+  exit 1
+fi
+if docker exec fredy "$CHROME" --headless --no-sandbox --disable-gpu --dump-dom https://example.com 2>&1 | grep -q "<html"; then
+  echo "Chrome works"
+else
+  echo "Chrome failed to render a page"
+  docker exec fredy "$CHROME" --headless --no-sandbox --disable-gpu --dump-dom https://example.com 2>&1 | head -20
+  exit 1
+fi
+
+echo ""
+echo "All checks passed."