Merge pull request #34 from dic-iit/action/gh-pages

Added changelog and action to update the documentation.

.github/workflows/gh-pages.yml

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+name: GitHub Pages
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  docs:
+    name: "Docs Update"
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@master
+      - uses: webfactory/[email protected]
+        with:
+          ssh-private-key: ${{ secrets.SSH_PRIVATE_GH_PAGES }}
+      - name: Dependencies
+        run: |
+          sudo apt update
+          sudo apt install -y xsltproc doxygen doxygen-doc texlive ghostscript graphviz
+
+      - name: Check remote
+        run: git ls-remote --heads --exit-code https://github.com/${{ github.repository }}.git gh-pages
+
+      - name: Configure Git
+        run: |
+          git config --global push.default upstream
+          git config --global user.name "GitHub Actions"
+          git config --global user.email "[email protected]"
+
+      - name: Clone and rebase
+        run: |
+          cd ${GITHUB_WORKSPACE}
+          git clone [email protected]:${{ github.repository }}.git gh-pages
+          cd gh-pages
+          git checkout gh-pages
+          git rebase master
+
+      - name: Build Doxygen
+        run: |
+          cd ${GITHUB_WORKSPACE}/gh-pages/doxygen
+          sed -i 's/PROJECT_NUMBER = .*/PROJECT_NUMBER = ${{ github.event.release.tag_name }}/' Doxyfile
+          doxygen ./Doxyfile
+
+      - name: Commit and push
+        run: |
+          cd ${GITHUB_WORKSPACE}/gh-pages
+          git add .
+          git commit --amend --no-edit
+          git push --force-with-lease
+

CHANGELOG.md

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+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.0] - 2021-02-02
+
+- First version implemented.