jibri: check for chrome bin before pre-warm (#1757)

jibri/rootfs/etc/services.d/40-jibri/run

@@ -4,7 +4,9 @@
 HOME=/home/jibri
 
 DAEMON=/opt/jitsi/jibri/launch.sh
+CHROME_BIN_PATH="$(which google-chrome)"
+[ $? -ne 0 ] && CHROME_BIN_PATH="$(which chromium)"
 # pre-warm google chrome before jibri launches to ensure fast chrome launch during recordings
-s6-setuidgid jibri /usr/bin/google-chrome --timeout=1000 --headless about:blank
+[ -n "$CHROME_BIN_PATH" ] && s6-setuidgid jibri $CHROME_BIN_PATH --timeout=1000 --headless about:blank
 exec s6-setuidgid jibri /bin/bash -c "exec $DAEMON"