Build and store javadocs (#213)

* Build and store javadocs

* fix typo

* fix more typos

* Switch to publish to gh-pages

* Remove from maven-build

* Add to deploy-sonatype

.github/workflows/deploy-sonatype.yml

@@ -39,3 +39,18 @@ jobs:
           NEXUS_PASSWORD: ${{ secrets.NEXUS_PASSWORD }}
           GPG_KEYNAME: ${{ secrets.GPG_KEYNAME }}
           GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
+  javadoc:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v2.1.0
+        with:
+          distribution: adopt
+          java-version: 16
+      - name: create-javadoc
+        run: mvn -B javadoc:javadoc
+      - name: Publish Javadoc
+        uses: JamesIves/github-pages-deploy-action@4.1.4
+        with:
+          branch: gh-pages # The branch the action should deploy to.
+          folder: target/site/apidocs # The folder the action should deploy.