tweak command

docker/Dockerfile

@@ -2,7 +2,11 @@ FROM mcr.microsoft.com/dotnet/aspnet:9.0-noble-amd64 AS dotnet-runtime
 
 FROM --platform=linux/amd64 ghcr.io/ersatztv/ersatztv-ffmpeg:7.1.1 AS runtime-base
 COPY --from=dotnet-runtime /usr/share/dotnet /usr/share/dotnet
-RUN apt-get update && apt-get install -y python3-pip && apt-get clean -y && python3 -m pip install --target=/app/pythonlibs streamlink
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends python3 python3-pip && \
+    python3 -m pip install --target=/app/pythonlibs --no-cache-dir streamlink && \
+    apt-get clean -y && \
+    rm -rf /var/lib/apt/lists/*
 
 # https://hub.docker.com/_/microsoft-dotnet
 FROM mcr.microsoft.com/dotnet/sdk:9.0-noble-amd64 AS build