docs: add Docker build failure investigation task and pause audio investigation.

task.md

@@ -1,4 +1,11 @@
-# Audio Investigation in Movies
+# Docker Build Failure Investigation
+
+- [x] Analyze `Dockerfile` and `docker-compose.yml` dependencies.
+- [x] Attempt to reproduce the build failure or gather more logs.
+- [x] Fix the build issue.
+- [ ] Verify the fix.
+
+# Audio Investigation in Movies (Paused)
 
 - [ ] Investigate `player_screen.dart` to understand how the player is initialized.
 - [ ] Determine differences between Movie, Series, and TV playback logic.