conan: Uploading from docker to Artifactory can fail with 500 due to permissions

Reported by other user, this fails while uploading from docker:

$  conan upload -r artifactory --all openssl/1.1.0e@user/stable
Uploading openssl/1.1.0e@user/stable to remote 'artifactory'
Uploading conanmanifest.txt                                           
[==================================================] 58B/58B          
ERROR: 
Error uploading file: conanmanifest.txt, 'b'{\n  "errors" : [ {\n    "status" : 500,\n    "message" : "Internal Server Error"\n  } ]\n}''
Uploading conanfile.py                                                
[==================================================] 1.5KB/1.5KB      
ERROR: 
Error uploading file: conanfile.py, 'b'{\n  "errors" : [ {\n    "status" : 500,\n    "message" : "Internal Server Error"\n  } ]\n}''
ERROR: Execute upload again to retry upload the failed files: conanmanifest.txt, conanfile.py. [Remote: artifactory]

Worked when uploaded directly from other OS.

At the end, it was a permissions issue (typical in docker). In any case, probably this shouldn’t end in a 500 internal server error, but fail sooner in the client.