Add git-chglog template for changelog creation

.chglog/CHANGELOG.tpl.md

@@ -0,0 +1,38 @@
+{{ range .Versions }}
+<a name="{{ .Tag.Name }}"></a>
+## {{ if .Tag.Previous }}[{{ .Tag.Name }}]({{ $.Info.RepositoryURL }}/compare/{{ .Tag.Previous.Name }}...{{ .Tag.Name }}){{ else }}{{ .Tag.Name }}{{ end }} ({{ datetime "2006-01-02" .Tag.Date }})
+
+{{ range .CommitGroups -}}
+### {{ .Title }}
+
+{{ range .Commits -}}
+* {{ .Subject }}
+{{ end }}
+{{ end -}}
+
+{{- if .RevertCommits -}}
+### Reverts
+
+{{ range .RevertCommits -}}
+* {{ .Revert.Header }}
+{{ end }}
+{{ end -}}
+
+{{- if .MergeCommits -}}
+### Merge Requests
+
+{{ range .MergeCommits -}}
+* {{ .Header }}
+{{ end }}
+{{ end -}}
+
+{{- if .NoteGroups -}}
+{{ range .NoteGroups -}}
+### {{ .Title }}
+
+{{ range .Notes }}
+{{ .Body }}
+{{ end }}
+{{ end -}}
+{{ end -}}
+{{ end -}}

.chglog/config.yml

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+style: gitlab
+template: CHANGELOG.tpl.md
+info:
+  title: CHANGELOG
+  repository_url: https://git.gfz-potsdam.de/sec34/btcsdiffusion
+options:
+  commits:
+    # filters:
+    #   Type:
+    #     - feat
+    #     - fix
+    #     - perf
+    #     - refactor
+  commit_groups:
+    # title_maps:
+    #   feat: Features
+    #   fix: Bug Fixes
+    #   perf: Performance Improvements
+    #   refactor: Code Refactoring
+  header:
+    pattern: "^((\\w+)\\s.*)$"
+    pattern_maps:
+      - Subject
+      - Type
+  notes:
+    keywords:
+      - BREAKING CHANGE