chore: override nginx config for Nano-Testnet Bravo

[luislhl]

Motivation

We needed to expose the /nano_contract/logs endpoint, but only for Nano-Testnet Bravo fullnodes.

Acceptance Criteria

• We should build a new Docker image tag in the Nano-Testnet project, which includes the endpoint
• We should refactor the Makefile so that all our projects are easily buildable there

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged

[github-actions]

Bencher Report

Branch	chore/allow-override-nginx-config
Testbed	ubuntu-22.04

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Benchmark	Latency	Benchmark Result minutes (m) (Result Δ%)	Lower Boundary minutes (m) (Limit %)	Upper Boundary minutes (m) (Limit %)
sync-v2 (up to 20000 blocks)	📈 view plot 🚷 view threshold	1.70 m (+3.56%) Baseline: 1.64 m	1.48 m (86.91%)	1.81 m (94.15%)

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.63%. Comparing base (a8366c2) to head (c459a59).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1332      +/-   ##
==========================================
- Coverage   85.68%   85.63%   -0.06%     
==========================================
  Files         427      427              
  Lines       32304    32305       +1     
  Branches     5032     5032              
==========================================
- Hits        27681    27665      -16     
- Misses       3607     3619      +12     
- Partials     1016     1021       +5     

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