mvp: wonky but working selenium firefox version

entrypoint.sh

@@ -1,15 +1,21 @@
 #!/bin/sh
 set -e
 
-export DISPLAY=:99
-
-Xvfb :99 -screen 0 1280x1024x24 -nolisten tcp -ac >/tmp/xvfb.log 2>&1 &
-XVFB_PID=$!
+XVFB_PID=""
 
 cleanup() {
-  kill "$XVFB_PID" >/dev/null 2>&1 || true
+    if [ -n "$XVFB_PID" ]; then
+        kill "$XVFB_PID" >/dev/null 2>&1 || true
+    fi
 }
 
 trap cleanup EXIT INT TERM
 
+if [ -z "$DISPLAY" ]; then
+    export DISPLAY=:0
+    export LIBGL_ALWAYS_SOFTWARE=1
+    Xvfb :0 -screen 0 1920x1080x24+32 -nolisten tcp -ac -dpi 96 >/tmp/xvfb.log 2>&1 &
+    XVFB_PID=$!
+fi
+
 exec /app/.venv/bin/python -u server.py