Error code 127 for bash file in machine post, but manual execution in container is successful

Tech Stack : python, django, DRF, ubuntu 14.04
I have added a bash file execution bash ./ in machine section’s post command.
I am getting

$ bash ./
bash: ./ No such file or directory

bash ./ returned exit code 127

Action failed: bash ./

So just for testing, i tried out a simple bash script :

echo "A"

For this also, same exit status as above
So I am quite sure that there is no problem with the contents of script
The project structure looks like this:


In circle.yml :


    - bash ./

Can you please help me in figuring out whats the issue?
Thanks in advance