Replace Travis CI with GitHub workflows

.github/workflows/build.yml

@@ -0,0 +1,19 @@
+name: "Build demo"
+on:
+  push:
+    branches:
+      - master
+jobs:
+  build:
+    run-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: cachix/install-nix-action@v17
+        with:
+          nix_path: nixpkgs=channel:nixpkgs-unstable
+      - run: nix develop -c hugo -s ./exampleSite/
+      - name: Deploy to GitHub Pages
+        uses: JamesIves/github-pages-deploy-action@v4.3.3
+        with:
+          branch: gh-pages
+          folder: exampleSite/public

.travis.yml

@@ -1,35 +0,0 @@
-dist: bionic
-language: generic
-
-branches:
-  only:
-    - master
-    - demo
-
-before_install:
-  - sudo apt-get update
-  - sudo apt-get install python3
-  - sudo apt-get install ruby wget
-  - wget "https://github.com/gohugoio/hugo/releases/download/v${HUGO_RELEASE}/hugo_extended_${HUGO_RELEASE}_Linux-64bit.deb"
-  - sudo dpkg -i *.deb
-  - sudo gem install asciidoctor
-
-script:
-  - curl https://api.github.com/repos/foo-dogsquared/hugo-theme-more-contentful | jq '.[0].sha' --raw-output | xargs -I{} hugo mod get "github.com/foo-dogsquared/hugo-theme-more-contentful@{}" && hugo mod tidy
-  - hugo
-
-env:
-  global:
-    - PRODUCTION=true
-    - HUGO_RELEASE=0.76.0
-
-deploy:
-  local_dir: "./public/"
-  provider: pages
-  skip_cleanup: true
-  github_token: $GITHUB_TOKEN  # Set in the settings page of your repository, as a secure variable
-  target_branch: gh-pages
-  on:
-    branch:
-        - demo
-        - master

CHANGELOG.adoc

@@ -44,6 +44,8 @@ E.g., if there is only `_dark`, the Hugo theme will generate the light theme.
 
 ** If given neither, fallback themes will be used.
 
+* Replace Travis CI with GitHub workflows.
+
 
 === Fixed