try add libwebp on docker

Dockerfile

@@ -5,7 +5,7 @@ RUN apt-get update \
 libexpat1 libfontconfig1 libgcc1 libgconf-2-4 libgdk-pixbuf2.0-0 libglib2.0-0 libgtk-3-0 libnspr4 \
 libpango-1.0-0 libpangocairo-1.0-0 libstdc++6 libx11-6 libx11-xcb1 libxcb1 libxcomposite1 \
 libxcursor1 libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 libxss1 libxtst6 python3 libcairo2-dev libpango1.0-dev libjpeg-dev libgif-dev librsvg2-dev \
-ca-certificates fonts-liberation libappindicator1 libnss3 lsb-release xdg-utils wget ffmpeg --yes --fix-missing --no-install-recommends\
+ca-certificates fonts-liberation libappindicator1 libnss3 lsb-release xdg-utils wget ffmpeg libwebp --yes --fix-missing --no-install-recommends\
 && wget --no-check-certificate https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb \
 && dpkg -i google-chrome-stable_current_amd64.deb || apt -y -f install \
 && rm google-chrome-stable_current_amd64.deb \