chore: update base image, target framework, and dependencies

- Change base image from `mcr.microsoft.com/dotnet/sdk:6.0` to `registry.access.redhat.com/ubi9/ubi-minimal`
- Update `TZ` environment variable to `Asia/Taipei`
- Update base image from `registry.access.redhat.com/ubi8/dotnet-80` to `base`
- Update target framework from `net6.0` to `net8.0`
- Update `PackageReference` versions for `Discord.Net.Webhook`, `Microsoft.Extensions.Hosting`, and `YoutubeDLSharp`
- Remove `COPY ["YoutubeLiveChatToDiscord.csproj", "."]`
- Remove `RUN dotnet build "YoutubeLiveChatToDiscord.csproj" -c Release -o /app/build`
- Remove `FROM build AS publish`
- Change `dotnet publish` command to include additional parameters
- Remove `dotnet publish` command for copying output files
- Update `ENTRYPOINT` command to `./YoutubeLiveChatToDiscord $@`
- Remove last line of the Dockerfile
- No changes in `YoutubeLiveChatToDiscord.csproj`

Signed-off-by: 陳鈞 <[email protected]>

Dockerfile

@@ -1,35 +1,50 @@
-#See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.
+### Base image
+FROM registry.access.redhat.com/ubi9/ubi-minimal AS base
 
-FROM mcr.microsoft.com/dotnet/runtime:6.0-alpine AS base
-WORKDIR /app
-RUN apk add --no-cache --virtual build-deps musl-dev gcc g++ python3-dev &&\
-    apk add --no-cache py3-pip tzdata &&\
-    pip install yt-dlp &&\
-    apk del build-deps
 ENV TZ=Asia/Taipei
+RUN microdnf -y install python3.11 tzdata && \
+    microdnf clean all && \
+    ln -s /usr/bin/python3.11 /usr/bin/python3
 
-# Disable file locking on Unix
-# https://github.com/dotnet/runtime/issues/34126#issuecomment-1104981659
-ENV DOTNET_SYSTEM_IO_DISABLEFILELOCKING=true
+RUN python3 -m venv /venv
+ENV PATH="/venv/bin:$PATH"
 
-FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
+### Build yt-dlp
+FROM base AS build_ytdlp
+
+RUN microdnf -y install python3.11-pip && \
+    pip3.11 install yt-dlp && \
+    microdnf -y remove python3.11-pip && \
+    microdnf clean all
+
+### Build .NET
+FROM registry.access.redhat.com/ubi8/dotnet-80 AS build
+
+USER 0
 WORKDIR /src
-COPY ["YoutubeLiveChatToDiscord.csproj", "."]
+
+COPY YoutubeLiveChatToDiscord.csproj .
 RUN dotnet restore "./YoutubeLiveChatToDiscord.csproj"
 COPY . .
-WORKDIR "/src/."
-RUN dotnet build "YoutubeLiveChatToDiscord.csproj" -c Release -o /app/build
 
-FROM build AS publish
-RUN dotnet publish "YoutubeLiveChatToDiscord.csproj" -c Release -o /app/publish
+RUN dotnet publish "YoutubeLiveChatToDiscord.csproj" -c Release -o /src/publish -p:PublishTrimmed=true --self-contained true
 
+### Final image
 FROM base AS final
+
+# Disable file locking on Unix
+# https://github.com/dotnet/runtime/issues/34126#issuecomment-1104981659
+ENV DOTNET_SYSTEM_IO_DISABLEFILELOCKING=true
+
+# Determines whether a .NET Core app runs in globalization-invariant mode without access to culture-specific data and behavior.
+# https://aka.ms/dotnet-missing-libicu
+ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=true
+
 WORKDIR /app
-COPY --from=publish /app/publish .
 
-RUN addgroup -g 1000 docker && \
-    adduser -u 1000 -G docker -h /home/docker -s /bin/sh -D docker \
-    && chown -R 1000:1000 .
-USER docker
+COPY --link --chown=1001:1001 --from=build /src/publish .
+COPY --link --from=build_ytdlp /venv /venv
+
+USER 0
 
-ENTRYPOINT ["dotnet", "YoutubeLiveChatToDiscord.dll"]
+ENTRYPOINT ./YoutubeLiveChatToDiscord $@

YoutubeLiveChatToDiscord.csproj

@@ -1,19 +1,18 @@
 <Project Sdk="Microsoft.NET.Sdk.Worker">
-
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+<TargetFramework>net8.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <UserSecretsId>dotnet-LiveChatToDiscord-ACE24696-7DD5-4164-8805-CF76B90CBA6C</UserSecretsId>
     <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
     <DockerfileContext>.</DockerfileContext>
     <ServerGarbageCollection>false</ServerGarbageCollection>
-  </PropertyGroup>
-
+</PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Discord.Net.Webhook" Version="3.8.1" />
-    <PackageReference Include="Microsoft.Extensions.Hosting" Version="6.0.1" />
-    <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.17.0" />
+<PackageReference Include="Discord.Net.Webhook" Version="3.13.0" />
+
     <PackageReference Include="YoutubeDLSharp" Version="0.4.2" />
+<PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.0" />
+
   </ItemGroup>
-</Project>
+</Project>