Release v0.57.0 (#8)

* migrate: GitHub Actions beta v2 (HCL to YAML)

* add: Pull Request template

* upgrade: actions

* enhance: GitHub Actions config

* update: readme

* remove: patreon image

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,3 @@
+- [ ] upgrade: hugo to `v0..`
+- [ ] update: tag on readme
+- [ ] release: `v0..` with **master** branch

.github/main.workflow

@@ -1,9 +0,0 @@
-workflow "Main workflow" {
-  on = "push"
-  resolves = ["docker-build"]
-}
-
-action "docker-build" {
-  uses = "actions/docker/cli@master"
-  args = "build -t peaceiris/actions-hugo ."
-}

.github/workflows/push.yml

@@ -0,0 +1,13 @@
+name: Push workflow
+
+on: [push]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Docker build
+      run: docker build -t peaceiris/actions-hugo .
+    - name: Check Hugo version
+      run: docker run peaceiris/actions-hugo:latest version