Add gstreamer codecs

Dockerfile

@@ -19,13 +19,17 @@ RUN set -eux; \
     https://brave-browser-apt-release.s3.brave.com/brave-browser-archive-keyring.gpg; \
     echo "deb [signed-by=/usr/share/keyrings/brave-browser-archive-keyring.gpg] https://brave-browser-apt-release.s3.brave.com/ stable main" | \
     tee /etc/apt/sources.list.d/brave-browser-release.list; \
-    apt update && apt install -y brave-browser
+    apt update; \
+    apt install -y brave-browser
 
 # install transmission and VLC
 RUN set -eux; \
-    apt-get update; \
     apt-get install -y transmission-gtk vlc
 
+# install gstreamer plugins
+RUN set -eux; \
+    apt-get  install -y gstreamer1.0-plugins-good gstreamer1.0-plugins-bad
+
 # add user to sudoers
 RUN set -eux; \
     usermod -aG sudo neko; \