Update Dockerfile

debian-stretch packages were missing for libva-drm2 so would not build

the base image mcr.microsoft.com/dotnet/core/sdk:${DOTNET_VERSION} is incorrectly referencing .NET Core 3-preview6 which will cause issues at runtime with library references being mismatched

Dockerfile

@@ -10,14 +10,14 @@ RUN apk add curl \
  && yarn build \
  && mv dist /dist
 
-FROM mcr.microsoft.com/dotnet/core/sdk:${DOTNET_VERSION} as builder
+FROM mcr.microsoft.com/dotnet/core/sdk:${DOTNET_VERSION}-buster as builder
 WORKDIR /repo
 COPY . .
 ENV DOTNET_CLI_TELEMETRY_OPTOUT=1
 RUN dotnet publish Jellyfin.Server --configuration Release --output="/jellyfin" --self-contained --runtime linux-x64 "-p:GenerateDocumentationFile=false;DebugSymbols=false;DebugType=none"
 
 FROM jellyfin/ffmpeg:${FFMPEG_VERSION} as ffmpeg
-FROM debian:stretch-slim
+FROM debian:buster-slim
 
 COPY --from=ffmpeg /opt/ffmpeg /opt/ffmpeg
 COPY --from=builder /jellyfin /jellyfin