如何通过Dockerfile安装Raku Cro Web框架？安装失败求助

尝试用Dockerfile封装基于Raku + Cro Web框架的Web应用时，无法成功安装Cro。使用的Dockerfile如下：

# Use the official Rakudo Star image
FROM rakudo-star:latest

RUN apt update && \
    apt upgrade -y && \
    apt install zip -y && \
    apt install build-essential -y && \
    rm -rf /var/lib/apt/lists/*

# Set the working directory inside the container
WORKDIR /app

# Copy your project files into the container
COPY ./bin /app/bin
COPY ./config /app/config
COPY ./lib /app/lib
COPY ./t /app/t
COPY ./META6.json /app
COPY ./www /app/www

RUN zef upgrade zef

# install dependencies not in raku.land
RUN git clone https://github.com/JuneKelly/perl6-config-clever && \
    cd perl6-config-clever && \
    zef install .

RUN git clone https://github.com/skinkade/crypt-random && \
    cd crypt-random  && \
    zef install .

# Install project dependencies
RUN zef install --verbose --force --/test Array::Circular
RUN zef install --verbose --force --/test Docker::File
RUN zef install --verbose --force --/test File::Ignore
RUN zef install --verbose --force --/test IO::Socket::Async::SSL
RUN zef install --verbose --force --/test Digest::SHA1::Native
RUN zef install --debug --/test cro
RUN zef install --verbose --force --/test --deps-only .

# Expose any necessary ports (optional)
# EXPOSE 8080

# Set the default command to run your Raku application
CMD ["raku", "/app/bin/app"]

构建时遇到错误：

> [18/20] RUN zef install --verbose --force --/test Cro::HTTP:
2.966 ===> Searching for: Cro::HTTP
37.74 Use of uninitialized value of type IO::Path in string context.
37.74 Methods .^name, .raku, .gist, or .say can be used to stringify it to something meaningful.
82.97 Use of uninitialized value of type IO::Path in string context.
82.97 Methods .^name, .raku, .gist, or .say can be used to stringify it to something meaningful.
82.97 Use of uninitialized value of type IO::Path in string context.
82.97 Methods .^name, .raku, .gist, or .say can be used to stringify it to something meaningful.
82.97 Use of uninitialized value of type IO::Path in string context.
82.97 Methods .^name, .raku, .gist, or .say can be used to stringify it to something meaningful.
82.97   in block  at /usr/share/perl6/site/sources/CD3A622C2C09A8A47FE369BE7FE1F5CB7001C1B1 (Zef::Client) line 563
82.97   in block  at /usr/share/perl6/site/sources/CD3A622C2C09A8A47FE369BE7FE1F5CB7001C1B1 (Zef::Client) line 563
82.97   in block  at /usr/share/perl6/site/sources/CD3A622C2C09A8A47FE369BE7FE1F5CB7001C1B1 (Zef::Client) line 563
82.97   in block  at /usr/share/perl6/site/sources/CD3A622C2C09A8A47FE369BE7FE1F5CB7001C1B1 (Zef::Client) line 563
82.97 Use of uninitialized value of type IO::Path in string context.
82.97 Methods .^name, .raku, .gist, or .say can be used to stringify it to something meaningful.
<SNIPPED>
Dockerfile:38
--------------------
  36 |     RUN zef install --verbose --force --/test IO::Socket::Async::SSL
  37 |     RUN zef install --verbose --force --/test Digest::SHA1::Native
  38 | >>> RUN zef install --verbose --force --/test Cro::HTTP
  39 |     RUN zef install --debug --/test cro
  40 |     RUN zef install --verbose --force --/test --deps-only .
--------------------
ERROR: failed to solve: process "/bin/sh -c zef install --verbose --force --/test Cro::HTTP" did not complete successfully: exit code: 1

• 合并Cro相关安装命令：分别安装Cro::HTTP和cro会导致zef重复处理依赖引发冲突，直接安装cro元包即可自动包含Cro::HTTP等核心组件，将这两步合并为：

  RUN zef install --debug --/test cro
  

• 切换稳定版Rakudo镜像：rakudo-star:latest可能是开发版存在兼容性问题，换成具体稳定版本如rakudo-star:2024.02，减少环境不确定性。
• 清理第三方模块仓库：安装完克隆的第三方模块后，删除仓库目录，避免镜像体积冗余和潜在冲突，示例：

  RUN git clone https://github.com/JuneKelly/perl6-config-clever && \
      cd perl6-config-clever && \
      zef install . && \
      cd .. && rm -rf perl6-config-clever
  

  同理处理crypt-random仓库。
• 完善META6.json依赖声明：在项目META6.json的depends字段中正确声明所有依赖（包括cro），这样zef install --deps-only .可自动处理所有模块，无需手动逐个安装，示例：

  "depends": [
      "cro",
      "Array::Circular",
      "Docker::File",
      "File::Ignore",
      "IO::Socket::Async::SSL",
      "Digest::SHA1::Native"
  ]
  

• 更新zef索引：在安装模块前执行zef update，确保模块索引最新，避免拉取旧版本或找不到模块：

  RUN zef update && zef upgrade zef
  

内容的提问来源于stack exchange，提问作者Seamus Brady