add missing Puppeteer dependency for Debian

mc_frontend/Dockerfile

@@ -8,7 +8,7 @@ WORKDIR /home/mc/mc_frontend
 RUN apt-get update
 # install Chromium dependencies
 RUN apt-get install -y libasound2 libatk1.0-0 libatk-bridge2.0-0 libcairo2 libcups2 libdrm-dev libgbm1 libnss3 \
-    libpango-1.0-0 libxcomposite1 libxdamage1 libxkbcommon-dev libxrandr2 libxshmfence-dev
+    libpango-1.0-0 libxcomposite1 libxdamage1 libxfixes3 libxkbcommon-dev libxrandr2 libxshmfence-dev
 # copy package.json so we can generate a clean lock file
 COPY package.json .
 # add Puppeteer manually because it will also install Chromium

mc_frontend/package.json

 {
   "name": "mc_frontend",
-  "version": "2.8.0",
+  "version": "2.8.1",
   "author": "Ionic Framework",
   "homepage": "https://ionicframework.com/",
   "scripts": {