feat(failover): Add steps for nginx and redis installation

[Aradhya-Tripathi]

• Add docker
• Add nginx
• Add redis-server
• Add failover setup script

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.05%. Comparing base (3d6fda3) to head (793294f).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5851      +/-   ##
===========================================
+ Coverage    73.03%   73.05%   +0.02%     
===========================================
  Files          106      106              
  Lines        17035    17046      +11     
  Branches       272      272              
===========================================
+ Hits         12441    12453      +12     
+ Misses        4572     4571       -1     
  Partials        22       22              

Flag	Coverage Δ
dashboard	73.05% <100.00%> (+0.02%)	⬆️

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