增编1：感谢您迄今为止的答复，这些答复都很有帮助。不幸的是，我在思想上犯了一个错误。实际问题发生在我在管道中执行RAILS_ENV=test rails webpacker:install或者在此过程中执行yarn install时。这将访问package.json。package.json包含以下行：
"foo-app": "ssh://git@foo.bar.com:7999/pac/foo-app.git"。我想如果我可以克隆仓库，这种访问也会起作用。但事实并非如此，我得到以下错误消息：

Installing all JavaScript dependencies [5.4.4]
         run yarn add @rails/webpacker@5.4.4 from "."
yarn add v1.22.19
warning package-lock.json found. Your project contains lock files generated by tools other than Yarn. It is advised not to mix package managers in order to avoid resolution inconsistencies caused by unsynchronized lock files. To clear this warning, remove package-lock.json.
[1/4] Resolving packages...
[2/4] Fetching packages...
error Command failed.
Exit code: 128
Command: git
Arguments: ls-remote --tags --heads ssh://git@foo.bar.com:7999/pac/foo-bar.git
Directory: /workspace
Output:
Repository not found
The requested repository does not exist or you are not authorised to access it.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.
Installing webpack and webpack-cli as direct dependencies
         run yarn add webpack@^4.46.0 webpack-cli@^3.3.12 from "."
yarn add v1.22.19
warning package-lock.json found. Your project contains lock files generated by tools other than Yarn. It is advised not to mix package managers in order to avoid resolution inconsistencies caused by unsynchronized lock files. To clear this warning, remove package-lock.json.
[1/4] Resolving packages...
[2/4] Fetching packages...
error Command failed.
Exit code: 128

所以我的问题实际上是，我想在安装yarn的过程中访问bb repo，但它不能以这种方式工作。
原题：
我有一个运行Jenkins的服务器。Jenkins服务器的SSH密钥存储在我的Bitbucket存储库中。我可以从Jenkins服务器运行以下命令，并将repo的内容克隆到我的Jenkins服务器：
git clone ssh://git@bb.repo-to-connect-to.com:7999/pac/sample-repo.git
我可以使用以下命令从Jenkins服务器SSH到另一个服务器：ssh -i ~/.ssh/id_rsa test_user@testServer.testhost.host
在Jenkins服务器上，一个Docker容器正在运行，我也想从其中访问BB repo。如果我将id_rsa和id_rsa.pub复制到Docker容器的~/.ssh中，然后使用docker exec -it test_rails_container bin/bash连接到容器并执行-i ~/.ssh/id_rsa test_user@testServer.testhost.host，则Docker容器通过SSH连接到testServer。但是，我不能运行git clone ssh://git@bb.repo-to-connect-to.com:7999/pac/sample-repo.git。当我这样做时，我得到以下错误：

git clone ssh://git@bb.repo-to-connect-to.com:7999/pac/sample-repo.git
Cloning into 'sample-repo'...
git@bb.repo-to-connect-to.com: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

现在我已经尝试了各种其他的可能性。除此之外，我创建了一个新的SSH密钥，在BB中注册，并尝试克隆存储库（没有成功）。
有谁能告诉我，我在哪里犯了错误，或者我是否在思想上犯了某种错误？