### Steps to reproduce

1. Have a local _minikube_ or _kind_ cluster set up

2. Try installing OpenProject via its helm chart


To reproduce the underlying issue more directly, you can also use _docker_ directly.

```bash
docker run --rm -v ./app-tmp:/app/tmp -v ./sys-tmp:/tmp --read-only -it openproject/openproject:15.3-slim ruby -e "require 'tempfile'; Dir.tmpdir"
```

### What is the buggy behavior?

* The containers fail to start due to the following error


```text
system temporary path is not writable: /tmp
/tmp is not writable: /tmp
. is not writable: /app
/usr/local/lib/ruby/3.4.0/tmpdir.rb:44:in 'Dir.tmpdir': could not find a temporary directory (ArgumentError)

end or raise ArgumentError, "could not find a temporary directory"
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
from -e:1:in '<main>'
```

### What is the expected behavior?

* The containers should start


### Begin of the deletion Screenshots and other files

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###End of the deletion Environment information

**OpenProject installation type**

* helm

* this happens here because the chart configures a read-only file system and mounts PVCs for its tmp folders (/app/tmp and /tmp)

* we have **not** observed this on production clusters because it seems to be specific to _minikube_ and _kind_ that mounted volumes are world writable


**OpenProject version**

v15.3.0