fix(server): make .dockerignore effective at repo root, pin yt-dlp in requirements

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.dockerignore

@@ -3,3 +3,5 @@ __pycache__/
 tests/
 docs/
 .git/
+*.md
+.claude/

server/Dockerfile

@@ -6,7 +6,7 @@ RUN apt-get update \
 
 WORKDIR /app
 COPY server/requirements.txt /app/server/requirements.txt
-RUN pip install --no-cache-dir -r /app/server/requirements.txt yt-dlp
+RUN pip install --no-cache-dir -r /app/server/requirements.txt
 
 COPY musicfetch /app/musicfetch
 COPY server /app/server

server/requirements.txt

@@ -3,3 +3,4 @@ uvicorn[standard]
 requests
 ytmusicapi
 rich
+yt-dlp