Fix CI

Dockerfile

@@ -12,10 +12,19 @@ ENV BUGSINK_ENVIRONMENT=$BUGSINK_ENVIRONMENT
 ENV BUGSINK_RELEASE=$BUGSINK_RELEASE
 ENV BUGSINK_SEND_DEFAULT_PII=$BUGSINK_SEND_DEFAULT_PII
 
+# Puppeteer's bundled Chrome downloads from storage.googleapis.com, which is
+# geo-blocked on the CI host ("this service is not available in your location").
+# Install Chromium from Debian instead: it's reachable, currently tracks the same
+# Chrome 149.x puppeteer expects, and apt pulls in the system libraries it needs.
+# So: skip puppeteer's postinstall browser download and point its launcher (used
+# by the prerender step) at the system binary.
+ENV PUPPETEER_SKIP_DOWNLOAD=true \
+    PUPPETEER_EXECUTABLE_PATH=/usr/bin/chromium
+
 COPY frontend/package.json frontend/package-lock.json ./
 RUN npm ci
 RUN apt-get update \
-  && npx puppeteer browsers install chrome --install-deps \
+  && apt-get install -y --no-install-recommends chromium \
   && rm -rf /var/lib/apt/lists/*
 COPY frontend/ ./
 RUN npm run build