feature: add matrix service

[piksel]

Fixes #112

[codecov]

Codecov Report

Merging #113 (de0d56c) into main (0f8a531) will increase coverage by 0.40%.
The diff coverage is 76.04%.

@@            Coverage Diff             @@
##             main     #113      +/-   ##
==========================================
+ Coverage   68.47%   68.87%   +0.40%     
==========================================
  Files          72       76       +4     
  Lines        2106     2262     +156     
==========================================
+ Hits         1442     1558     +116     
- Misses        547      572      +25     
- Partials      117      132      +15     

Impacted Files	Coverage Δ
pkg/services/matrix/matrix.go	66.66% <66.66%> (ø)
pkg/services/matrix/matrix_client.go	70.17% <70.17%> (ø)
pkg/router/servicemap.go	100.00% <100.00%> (ø)
pkg/services/matrix/matrix_api.go	100.00% <100.00%> (ø)
pkg/services/matrix/matrix_config.go	100.00% <100.00%> (ø)

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[kubax]

Hi,

is there any ETA on this? Some time ago it seems like watchtower added some check on the url and i can't push notifications to my matrix server because of that (previous it worked fine through a slack compatible webproxy bot, but it is not updates in month, and thus not compatible with the new[?] type of slack notifications)

i'd love to have this feature implemented...