pipeline siivous ja testikattavuuden nosto (#9)

Co-authored-by: moilanik <niko.moilanen@tietoevry.com>
Reviewed-on: #9

.simplecov

@@ -0,0 +1,5 @@
+SimpleCov.start do
+  add_filter '/tests/'
+  add_filter '/node_modules/'
+  add_filter '/git-pages/'
+end