Added CHANGELOG.md

CHANGELOG.md

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+# CHANGELOG
+
+## Key notes - PLEASE READ
+
+1. Detailed changes available at the [GitHub repository's commit history](https://github.com/patschi/parsedmarc-dockerized/commits/master).
+2. These are rolling changes. There won't be a specific version number.
+3. Please closely read any migration/update notes before updating. Certain manual intervention might be needed.
+
+## Log
+
+- 2024-02-24
+  - General project hygiene:
+    - Updated README: added troubleshooting section, using new docker compose method, new wording, etc
+    - Added this CHANGELOG file
+    - Added renovate
+    - Updated dependencies
+  - Updated sample configuration with more notes and settings of parsedmarc, also moved settings in ini-file to prevent deprecation messages
+  - Make port binding configurable via environment variable (#3)
+  - Updated elasticsearch and kibana to 7.17.18, also fixes security vulnerabilites in older versions (#18)
+  - Adding further OS dependencies `python3-gi python3-gi-cairo gir1.2-secret-1` to hopefully fix msgraph implementation (#8)
+
+- 2022-06-11
+  - Switch from GeoLite2-City to GeoLite2-Country, as only country-based geolocation is used. Efficiency. (#5)
+
+- 2020-08-09
+  - Initial release.