fix: make Playwright runtime work in docker

Dockerfile

@@ -1,10 +1,15 @@
-FROM node:20-alpine
+FROM node:20-bookworm-slim
 
 WORKDIR /app
 
 COPY package*.json ./
 RUN npm install
 
+# Playwright's Chromium needs system libraries that Alpine does not provide
+# reliably for this app's CI/runtime path. Install the Linux dependencies in
+# the image so browser tests can launch in GitHub Actions and container runs.
+RUN npx playwright install --with-deps chromium
+
 COPY . .
 
 RUN npm run prisma:generate