feat(config): accept templates for PROXIED and TTL

[favonia]

No description provided.

[codecov]

Codecov Report

Merging #214 (ee69edc) into main (a2b2e9b) will increase coverage by 0.66%.
The diff coverage is 99.46%.

❗ Current head ee69edc differs from pull request most recent head 76d0293. Consider uploading reports for the commit 76d0293 to get more accurate results

@@            Coverage Diff             @@
##             main     #214      +/-   ##
==========================================
+ Coverage   83.72%   84.38%   +0.66%     
==========================================
  Files          27       28       +1     
  Lines        1702     1755      +53     
==========================================
+ Hits         1425     1481      +56     
+ Misses        268      266       -2     
+ Partials        9        8       -1     

Flag	Coverage Δ
unittests	84.38% <99.46%> (+0.66%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cmd/ddns.go	0.00% <0.00%> (ø)
internal/api/ttl.go	100.00% <100.00%> (ø)
internal/config/config.go	98.95% <100.00%> (+1.09%)	⬆️
internal/config/env.go	98.52% <100.00%> (+0.06%)	⬆️
internal/domain/domain.go	100.00% <100.00%> (ø)
internal/domain/fqdn.go	100.00% <100.00%> (ø)
internal/domain/template.go	100.00% <100.00%> (ø)
internal/domain/wildcard.go	100.00% <100.00%> (ø)
internal/setter/setter.go	100.00% <100.00%> (ø)
internal/updater/updater.go	100.00% <100.00%> (ø)
... and 1 more

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