Update package name to scoped format and add Gitea configuration documentation

docs/GITEA.md

@@ -0,0 +1,6 @@
+# Gitea Configuration
+
+```
+npm config set @dom:registry=https://gitea.koszewscy.waw.pl/api/packages/slawek/npm/
+npm config set -- '//gitea.koszewscy.waw.pl/api/packages/slawek/npm/:_authToken' "personal_access_token"
+```