如何在自托管的ubuntu容器代理上构建dotnet核心?

我有一个使用ubuntu的自托管容器。

FROM ubuntu:18.04

# To make it easier for build and release pipelines to run apt-get,
# configure apt to not require confirmation (assume the -y argument by default)
ENV DEBIAN_FRONTEND=noninteractive
RUN echo "APT::Get::Assume-Yes \"true\";" > /etc/apt/apt.conf.d/90assumeyes

RUN apt-get update && apt-get install -y --no-install-recommends \
    ca-certificates \
    curl \
    jq \
    git \
    iputils-ping \
    libcurl4 \
    libicu60 \
    libunwind8 \
    netcat \
    libssl1.0 \
    zip \
    unzip \
  && rm -rf /var/lib/apt/lists/*

RUN curl -LsS https://aka.ms/InstallAzureCLIDeb | bash \
  && rm -rf /var/lib/apt/lists/*

# Can be 'linux-x64', 'linux-arm64', 'linux-arm', 'rhel.6-x64'.
ENV TARGETARCH=linux-x64

WORKDIR /azp

COPY ./start.sh .
RUN chmod +x start.sh

ENTRYPOINT ["./start.sh"]

它在azure平台上运行并处于活动状态。我正在这个代理上运行一个angular build管道,并成功运行。

但当我创建了一个dotnet核心项目并基于这个代理构建时,它抛出了异常。

如果我使用以下命令:

trigger:
- main

pool:
  name: PCDOCKER

variables:
  solution: '**/*.sln'
  buildPlatform: 'Any CPU'
  buildConfiguration: 'Release'
  projectName: vitrin-api

steps:
- task: NuGetToolInstaller@1

- task: DotNetCoreCLI@2
  inputs:
    command: 'restore'
    feedsToUse: 'select'
    vstsFeed: 'my-vsts-feed' # A series of numbers and letters

- task: DotNetCoreCLI@2
  inputs:
    command: 'build'
    arguments: '--configuration $(buildConfiguration)'
  displayName: 'dotnet build $(buildConfiguration)'

错误在DotNetCoreCLI@2步骤:

##[error]Error: Unable to locate executable file: 'dotnet'. Please verify either the file path exists or the file can be found within a directory specified by the PATH environment variable. Also check the file mode to verify the file is executable.
##[error]Packages failed to restore

如果我使用

- task: NuGetCommand@2
  inputs:
    restoreSolution: '$(solution)'

而不是DotNetCoreCLI@2,它会抛出异常“未找到” 单声道 "

如何在我的自托管容器上构建我的dotnet应用程序?