[skip ci] Add auto changelog generator

.auto-changelog

@@ -0,0 +1,6 @@
+{
+  "template": "keepachangelog",
+  "unreleased": true,
+  "startingDate": "2021-08-08",
+  "tagPattern": "^[0-9]+\\.[0-9]+\\.[0-9]+$"
+}

.github/workflows/changelog.yml

@@ -1,17 +1,41 @@
 name: changelog
 
 on:
-  pull_request:
+  release:
+    types: [published]
   workflow_dispatch:
 
 jobs:
-  generate_changelog:
+  create_changelog_pr:
     runs-on: ubuntu-latest
-    name: Generate changelog for master branch
     steps:
-      - uses: actions/checkout@v1
-      - name: Generate changelog
-        uses: heinrichreimer/github-changelog-generator-action@v2.1.1
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
         with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-      - run: cat CHANGELOG.md
+          node-version: '14'
+      - name: Update npm packages
+        uses: technote-space/create-pr-action@v2
+        with:
+          GITHUB_TOKEN: ${{ secrets.PERSONAL_TOKEN }}
+          EXECUTE_COMMANDS: |
+            npm install -g auto-changelog
+            auto-changelog
+          COMMIT_MESSAGE: 'chore: update changelog'
+          PR_BRANCH_PREFIX: 'changelog/'
+          PR_BRANCH_NAME: 'chore-update-changelog-${PR_ID}'
+          PR_TITLE: 'chore: update changelog'
+          PR_BODY: |
+            <!-- START pr-commits -->
+            <!-- END pr-commits -->
+            ## Base PullRequest
+            ${PR_TITLE} (${PR_NUMBER_REF})
+            ## Command results
+            <details>
+              <summary>Details: </summary>
+              ${COMMANDS_OUTPUT}
+            </details>
+            ## Changed files
+            <details>
+              <summary>${FILES_SUMMARY}: </summary>
+              ${FILES}
+            </details>

CHANGELOG.md

@@ -1,5 +1,63 @@
 # Changelog
 
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
+
+<!-- auto-changelog-above -->
+
+## [1.1.13](https://github.com/openflagr/flagr/compare/1.1.12...1.1.13) - 2021-08-07
+
+### Merged
+
+- Prepare for 1.1.13 release [`#13`](https://github.com/openflagr/flagr/pull/13)
+- Remove github.com/dgrijalva/jwt-go [`#10`](https://github.com/openflagr/flagr/pull/10)
+- [skip ci] Add try-openflagr website [`#6`](https://github.com/openflagr/flagr/pull/6)
+- Add codecov and fix docs [`#5`](https://github.com/openflagr/flagr/pull/5)
+- Add github CI [`#1`](https://github.com/openflagr/flagr/pull/1)
+- Upgrade to 1.16 [`#460`](https://github.com/checkr/flagr/pull/460)
+- Fix markdown-it xss and sqlite3 build issue [`#451`](https://github.com/checkr/flagr/pull/451)
+- Bump y18n from 4.0.0 to 4.0.3 in /browser/flagr-ui [`#444`](https://github.com/checkr/flagr/pull/444)
+- Bump ssri from 6.0.1 to 6.0.2 in /browser/flagr-ui [`#441`](https://github.com/checkr/flagr/pull/441)
+- Fix integration tests [`#443`](https://github.com/checkr/flagr/pull/443)
+- Bump elliptic from 6.5.3 to 6.5.4 in /browser/flagr-ui [`#435`](https://github.com/checkr/flagr/pull/435)
+- Add dropdown by state to filter flags [`#433`](https://github.com/checkr/flagr/pull/433)
+- Bump swagger cli / golangci-lint / UI related package.json [`#432`](https://github.com/checkr/flagr/pull/432)
+- Fix typo in home.md [`#415`](https://github.com/checkr/flagr/pull/415)
+- Add support for kafka auth using SASL with PLAIN mechanism [`#412`](https://github.com/checkr/flagr/pull/412)
+- Evaluation with FlagTagsOperator to match any or all tags [`#408`](https://github.com/checkr/flagr/pull/408)
+- Allow /api/v1/health bypass auth default [`#407`](https://github.com/checkr/flagr/pull/407)
+
+### Commits
+
+- Fix markdown-it xss [`f039933`](https://github.com/openflagr/flagr/commit/f03993346f7cd573b4afe2995ef1e3d24ff5a105)
+- Bump UI related package.json [`827f199`](https://github.com/openflagr/flagr/commit/827f199b1ebc4b124b326e674e9a68b57410711a)
+- Bump golangci and swagger cli [`fd23dd1`](https://github.com/openflagr/flagr/commit/fd23dd1e57fa880055c054c2f11a1a27641d883e)
+
+
+### Migration Guide
+
+All the integration tests are the same, which guarantees the
+- API backward compatibility with `checkr/flagr:1.1.12`
+- Environment variables are the same and don't need any changes
+
+Docker users:
+```
+docker pull checkr/flagr:1.1.12
+=>
+docker pull ghcr.io/openflagr/flagr:1.1.13
+```
+
+Golang users:
+```
+go get github.com/checkr/flagr
+=>
+go get github.com/openflagr/flagr
+```
+
 ## [1.1.12](https://github.com/checkr/flagr/tree/1.1.12) (2020-09-16)
 
 [Full Changelog](https://github.com/checkr/flagr/compare/1.1.11...1.1.12)