Thanks for your response,
actually the problem is that i am totally new in CircleCi , what do you mean by preformatted text in YAML ?(I have searched but couldn’t find helpful topic) can you explain more. also i changed the spaces to 4, but the problem still is remain.
The keys version and jobs should have no indentation, and yet you have four. Are you sure that what you have presented is an accurate representation of what is in your file?
If you changed the file on your side, please change it above too - it needs four additional spaces. That is aside from the problem that the whole file appears to be indented four spaces, which is incorrect.
oh , it was my mistake, when i uploaded them .
so now i edited my post , and copy accurate file .
the main file does not have additional spaces.
maybe now you can realize better.
Build-agent version 0.1.1301-dd8e9365
Starting container circleci/ruby:2.2.3-jessie
image cache not found on this host, downloading circleci/ruby:2.2.3-jessie
Error response from daemon: manifest for circleci/ruby:2.2.3-jessie not found
The string circleci/ruby:2.2.3-jessie must be a valid Docker image on Docker Hub. Have a look at CircleCI’s Docker Hub page to find all the valid image names.
I checked Docker Hub , how can I realize which version of Ruby should I use ? ruby:2.2.3-jessie this version was not available
(I did not do this configuration, someone else did it and I am trying to migrating, that’s why i have a lot of question )