Merge branch 'patnala_issue_4_create_first_ci_pipeline' into 'main'

added gitignore files and CI configuration file

See merge request !4

.gitignore

 calculator/
 __pycache__/
+.coverage

.gitlab-ci.yml

+stages:        
+  - info
+
+infojob:
+ stage: info
+ tags:
+ - linux
+ script:
+   - uname -a
+   - cat /etc/*release
+   - rpm -qa
+