Do not generate config.json if template is empty

[hellt]

No description provided.

[codecov]

Codecov Report

Merging #1585 (b76bd9a) into main (90aa6e0) will decrease coverage by 0.04%.
Report is 1 commits behind head on main.
The diff coverage is 0.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1585      +/-   ##
==========================================
- Coverage   48.58%   48.55%   -0.04%     
==========================================
  Files         133      133              
  Lines       12773    12778       +5     
==========================================
- Hits         6206     6204       -2     
- Misses       5863     5870       +7     
  Partials      704      704              

Files Changed	Coverage Δ
nodes/srl/srl.go	57.07% <0.00%> (-0.65%)	⬇️

... and 1 file with indirect coverage changes

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