docs: added actions (#21)

www/content/ci.md

@@ -89,8 +89,37 @@ deploy-to-prod:
 ````
 
 ### Github Actions
+Build-tools can also be used within our official build-tools actions through [GitHub Actions][actions]
 
-TODO
+You can create a workflow for pushing your releases by putting YAML configuration to `.github/workflows/build.yml`.
+
+Below is a simple snippet to use the [build-action] and [push-action] in your workflow:
+
+```yaml
+name: Buildtool
+on: [push]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      DOCKERHUB_USERNAME: sparetimecoders
+      DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
+      DOCKERHUB_NAMESPACE: sparetimecoders
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+      - name: build
+        uses: buildtool/build-action@v1
+      - name: push
+        uses: buildtool/push-action@v1
+```
+
+Read more about our actions here:
+* [build-action]
+* [push-action]
+* [deploy-action]
+
+> For detailed intructions please follow GitHub Actions [workflow syntax][syntax].
 
 ### TeamCity
 [TeamCity] can be configured with a `.teamcity/settings.kts` file in your project. 
@@ -163,6 +192,11 @@ jobs:
 
 [Buildkite]: https://buildkite.com
 [Gitlab CI]: https://docs.gitlab.com/ce/ci
-[github actions]: https://github.com/features/actions
+[Github Actions]: https://github.com/features/actions
 [teamcity]: https://www.jetbrains.com/teamcity
-[azure devops]: https://azure.microsoft.com/en-us/services/devops/pipelines/
+[azure devops]: https://azure.microsoft.com/en-us/services/devops/pipelines/
+[build-action]: https://github.com/buildtool/build-action
+[push-action]: https://github.com/buildtool/push-action
+[deploy-action]: https://github.com/buildtool/deploy-action
+[actions]: https://github.com/features/actions
+[syntax]: https://help.github.com/en/articles/workflow-syntax-for-github-actions#About-yaml-syntax-for-workflows