Added working docker configuration, fixed a requirement, added strict…

[akshat0047]

Implemented the following changes to create make the project compatible with docker:

• Added .dockerignore
• Edited Dockerfiles to use centos: latest
• Edited docker-compose.yml to take build a working system, which was broken before
• Added strict check on env variables in Django Settings, removing the default values creating conflicts in DevOps tasks

[pep8speaks]

Hello @akshat0047! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2020-10-05 02:57:49 UTC

[codecov-commenter]

Codecov Report

Merging #703 into master will decrease coverage by 0.31%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #703      +/-   ##
==========================================
- Coverage   81.57%   81.26%   -0.32%     
==========================================
  Files          43       40       -3     
  Lines        6036     5726     -310     
  Branches      921      884      -37     
==========================================
- Hits         4924     4653     -271     
+ Misses        789      741      -48     
- Partials      323      332       +9     

Impacted Files	Coverage Δ
yaksh/views.py	71.93% <0.00%> (-1.07%)	⬇️
yaksh/bash_stdio_evaluator.py	80.55% <0.00%> (-0.53%)	⬇️
yaksh/cpp_code_evaluator.py	83.67% <0.00%> (-0.49%)	⬇️
yaksh/java_code_evaluator.py	84.00% <0.00%> (-0.47%)	⬇️
yaksh/hook_evaluator.py	78.43% <0.00%> (-0.42%)	⬇️
yaksh/r_code_evaluator.py	79.41% <0.00%> (-0.30%)	⬇️
yaksh/cpp_stdio_evaluator.py	82.35% <0.00%> (-0.26%)	⬇️
yaksh/grader.py	91.34% <0.00%> (-0.25%)	⬇️
yaksh/bash_code_evaluator.py	78.49% <0.00%> (-0.23%)	⬇️
yaksh/scilab_code_evaluator.py	86.11% <0.00%> (-0.20%)	⬇️
... and 10 more

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