Lowkey Vault Docker does not support dynamic host ports - URI validation

[nagyesta]

Issue: #1319

Description

• Adds better URI validation to filter out invalid host names
• Updates tests
• Updates documentation

Entry point

Checklists

• I have rebased my branch
• My commit message is meaningful
• The commit messages use semantic versioning: {major}, {minor} or {patch}
• The changes are focusing on the issue at hand
• I have maintained or increased test coverage

Notes

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 98.85%. Comparing base (23c7b26) to head (46d9d50).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
.../github/nagyesta/lowkeyvault/AppConfiguration.java	33.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1321      +/-   ##
============================================
- Coverage     98.89%   98.85%   -0.04%     
- Complexity     2034     2036       +2     
============================================
  Files           239      239              
  Lines          4976     4982       +6     
  Branches        197      198       +1     
============================================
+ Hits           4921     4925       +4     
- Misses           42       43       +1     
- Partials         13       14       +1     

Flag	Coverage Δ
app	99.32% <75.00%> (-0.05%)	⬇️
client	94.00% <ø> (ø)
testcontainers	96.05% <ø> (ø)

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