对于 custom-container 希望不要自动附加额外的环境变量

我使用 funcraft 部署一个 custom-container 类型的函数，除了 template.yml 中通过 EnvironmentVariables 定义的环境变量外实际部署还给我附加了几个其他环境变量，比如 PATH，LD_LIBRARY_PATH，等导致我现在每次都得部署后再上去手动删，否则无法正常运行。

Start by tracing how a custom-container deployment reads EnvironmentVariables from template.yml and where deployment-time variables such as PATH and LD_LIBRARY_PATH are added. Confirm the expected behavior for custom-container functions, then verify that only the variables explicitly defined in template.yml remain after deployment.

Written by the indexing model from the issue text.