docs: add changelog

CHANGELOG.md

@@ -0,0 +1,25 @@
+# Changelog
+
+## [Unreleased](https://github.com/padok-team/terraform-google-lb/tree/HEAD)
+
+[Full Changelog](https://github.com/padok-team/terraform-google-lb/compare/v1.0.0...HEAD)
+
+**Merged pull requests:**
+
+- chore: remove useless comments [\#6](https://github.com/padok-team/terraform-google-lb/pull/6) ([spoukke](https://github.com/spoukke))
+- Chore/license and codeowners [\#5](https://github.com/padok-team/terraform-google-lb/pull/5) ([spoukke](https://github.com/spoukke))
+- style: use tf naming conventions [\#4](https://github.com/padok-team/terraform-google-lb/pull/4) ([spoukke](https://github.com/spoukke))
+- docs: improve readme [\#3](https://github.com/padok-team/terraform-google-lb/pull/3) ([edix9](https://github.com/edix9))
+
+## [v1.0.0](https://github.com/padok-team/terraform-google-lb/tree/v1.0.0) (2022-01-14)
+
+[Full Changelog](https://github.com/padok-team/terraform-google-lb/compare/e3271ecf7cedad94784d0c42379aed7e81280dba...v1.0.0)
+
+**Merged pull requests:**
+
+- Feat: allow using multiple negative caching policies in cdn\_policy [\#2](https://github.com/padok-team/terraform-google-lb/pull/2) ([piaverous](https://github.com/piaverous))
+- Feat: allow using existing ip [\#1](https://github.com/padok-team/terraform-google-lb/pull/1) ([piaverous](https://github.com/piaverous))
+
+
+
+\* *This Changelog was automatically generated by [github_changelog_generator](https://github.com/github-changelog-generator/github-changelog-generator)*