update base cuda version to 11.8; some dockerfile-gpu fixes

docker/Dockerfile.gpu

@@ -1,44 +1,30 @@
-FROM nvidia/cuda:11.2.2-cudnn8-runtime-ubuntu20.04
-
+FROM nvidia/cuda:11.8.0-cudnn8-runtime-ubuntu22.04
 ARG DEBIAN_FRONTEND=noninteractive
 
 # Remove any third-party apt sources to avoid issues with expiring keys.
 RUN rm -f /etc/apt/sources.list.d/*.list
 
 # Install some basic utilities.
-RUN apt-get update && apt-get install -y \
+RUN apt-get update && apt-get install -y --no-install-recommends \
     curl \
     ca-certificates \
     sudo \
     git \
     bzip2 \
     libx11-6 \
- && rm -rf /var/lib/apt/lists/*
-
-RUN apt update
-
-# install python
-RUN apt install software-properties-common -y && \
-    add-apt-repository ppa:deadsnakes/ppa && \
-    apt update
-
-RUN apt install python3-dev -y && \
-    apt install python-is-python3
-    
-
-# install pip
-RUN apt install python3-pip -y
+    python3-dev \
+    python3-pip \
+    && python3 -m pip install --upgrade pip \
+    && rm -rf /var/lib/apt/lists/*
 
 # Create a working directory.
 RUN mkdir /app
 WORKDIR /app
 
-COPY scripts/setup.sh /app
-COPY requirements/ /app
+COPY scripts/setup.sh requirements/server.txt /app
 
-RUN apt update --fix-missing
-RUN bash setup.sh
-RUN pip install -r server.txt
+RUN apt update && bash setup.sh && rm setup.sh
+RUN pip install -r server.txt && rm server.txt
 
 COPY whisper_live /app/whisper_live