Docker: drop root in test images

scripts/e2e/Dockerfile

@@ -22,4 +22,8 @@ RUN pnpm install --frozen-lockfile
 RUN pnpm build
 RUN pnpm ui:build
 
+RUN useradd --create-home --shell /bin/bash appuser \
+  && chown -R appuser:appuser /app
+USER appuser
+
 CMD ["bash"]

scripts/e2e/Dockerfile.qr-import

@@ -7,3 +7,7 @@ WORKDIR /app
 COPY . .
 
 RUN pnpm install --frozen-lockfile
+
+RUN useradd --create-home --shell /bin/bash appuser \
+  && chown -R appuser:appuser /app
+USER appuser