Switch CircleCI to GitHub Actions

.github/workflows/ci.yml

@@ -0,0 +1,20 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  verify:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up JDK
+        uses: actions/setup-java@v3
+        with:
+          java-version: '8'
+          cache: maven
+      - name: Build with Maven
+        run: ./mvnw --batch-mode verify -Djpt.btf.provision=true

CONTRIBUTING.md

@@ -6,9 +6,8 @@ Thank you for taking the time to contribute!
 
 Pull requests, issues and comments are welcome. For pull requests, please:
     1. fork the repo
-    2. enable CI for your fork, see [CircleCI docs](https://circleci.com/docs/2.0/project-build/#adding-projects)
-    3. create a branch with your changes
-    4. raise a pull request
+    2. create a branch with your changes
+    3. raise a pull request
 
 Atlassian requires contributors to sign a Contributor License Agreement,
 known as a CLA. This serves as a record stating that the contributor is

README.md

@@ -1,5 +1,3 @@
-[![CircleCI](https://circleci.com/gh/atlassian/jpt-example-btf.svg?style=svg)](https://circleci.com/gh/atlassian/jpt-example-btf)
-
 # Benchmark your Jira instance
 
 Read and customize the [benchmark](src/test/java/com/atlassian/performance/tools/examplebtf/MyBtfBenchmarkIT.java).