Setup Github Actions for Shaarli

This is kind of a quick & dirty setup in order to fix our non-CI current status.
We can later decide to either improve it or fix Drone CI.

Related to #1754

.drone.yml

@@ -1,115 +0,0 @@
----
-
-kind: pipeline
-type: docker
-name: php-8.0
-
-steps:
-  - name: test-php-8.0
-    image: shaarli/drone-ci-base:8.0
-    commands:
-      - composer config --unset platform && composer config platform.php 8.0
-      - composer update --ignore-platform-req=php
-      - composer remove --dev --ignore-platform-req=php phpunit/phpunit
-      - composer require --dev --ignore-platform-req=php phpunit/php-text-template ^2.0
-      - composer require --dev --ignore-platform-req=php phpunit/phpunit ^9.0
-      - make clean
-      - make check_permissions
-      - make code_sniffer
-      - make all_tests
-
----
-
-kind: pipeline
-type: docker
-name: php-7.4
-
-steps:
-  - name: test-php-7.4
-    image: shaarli/drone-ci-base:7.4
-    commands:
-      - composer config --unset platform && composer config platform.php 7.4
-      - composer update
-      - make clean
-      - make check_permissions
-      - make code_sniffer
-      - make all_tests
-
----
-
-kind: pipeline
-type: docker
-name: php-7.3
-
-steps:
-  - name: test-php-7.3
-    image: shaarli/drone-ci-base:7.3
-    commands:
-      - composer config --unset platform && composer config platform.php 7.3
-      - composer update
-      - make clean
-      - make check_permissions
-      - make code_sniffer
-      - make all_tests
-
----
-
-kind: pipeline
-type: docker
-name: php-7.2
-
-steps:
-  - name: test-php-7.2
-    image: shaarli/drone-ci-base:7.2
-    commands:
-      - composer config --unset platform && composer config platform.php 7.2
-      - composer update
-      - make clean
-      - make check_permissions
-      - make code_sniffer
-      - make all_tests
-
----
-
-kind: pipeline
-type: docker
-name: php-7.1
-
-steps:
-  - name: test-php-7.1
-    image: shaarli/drone-ci-base:7.1
-    commands:
-      - composer config --unset platform && composer config platform.php 7.1
-      - composer update
-      - make clean
-      - make check_permissions
-      - make code_sniffer
-      - make all_tests
-
----
-
-kind: pipeline
-type: docker
-name: node-10
-
-steps:
-  - name: test-node-10
-    image: node:10
-    commands:
-      - yarn install
-      - yarn run build # verify successful frontend builds
-      - make eslint # javascript static analysis
-      - make sasslint # linter for SASS syntax
-
----
-
-kind: pipeline
-type: docker
-name: python-3.6
-
-steps:
-  - name: test-python-3.6
-    image: python:3.6-slim
-    commands:
-      - pip install mkdocs
-      - mkdocs build --clean

.github/workflows/ci.yml

@@ -0,0 +1,99 @@
+name: Shaarli CI
+on: [push, pull_request]
+jobs:
+  php:
+    runs-on: ubuntu-18.04
+    strategy:
+      matrix:
+        php-versions: ['7.1', '7.2', '7.3', '7.4', '8.0', '8.1']
+    name: PHP ${{ matrix.php-versions }}
+    steps:
+      - name: Set locales
+        run: |
+          sudo locale-gen de_DE.utf8 && \
+          sudo locale-gen en_US.utf8 && \
+          sudo locale-gen fr_FR.utf8 && \
+          sudo dpkg-reconfigure --frontend=noninteractive locales
+
+      - name: Install Gettext
+        run: sudo apt-get install gettext
+
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          extensions: gd, xml, curl, mbstring, intl, gettext
+          tools: composer:v2
+
+      - name: Check PHP version
+        run: php -v
+
+      - name: Setup Composer from PHP version + update
+        run: composer config --unset platform && composer config platform.php ${{ matrix.php-versions }}
+
+      - name: Update dependencies for PHP 8.x
+        if: ${{ matrix.php-versions == '8.0' || matrix.php-versions == '8.1' }}
+        run: |
+          composer update --ignore-platform-req=php && \
+          composer remove --dev --ignore-platform-req=php phpunit/phpunit && \
+          composer require --dev --ignore-platform-req=php phpunit/php-text-template ^2.0 && \
+          composer require --dev --ignore-platform-req=php phpunit/phpunit ^9.0
+
+      - name: Update dependencies for PHP 7.x
+        if: ${{ matrix.php-versions != '8.0' && matrix.php-versions != '8.1' }}
+        run: composer update
+
+      - name: Clean up
+        run: make clean
+
+      - name: Check permissions
+        run: make check_permissions
+
+      - name: Run PHPCS
+        run: make code_sniffer
+
+      - name: Run tests
+        run: make all_tests
+
+  node:
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: '14.x'
+
+      - name: Yarn install
+        run: yarn install
+
+      - name: Verify successful frontend builds
+        run: yarn run build
+
+      - name: JS static analysis
+        run: make eslint
+
+      - name: Linter for SASS syntax
+        run: make sasslint
+
+  python:
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          node-version: 3.8
+
+      - name: Install dependencies
+        run: pip install mkdocs
+
+      - name: Build documentation
+        run: mkdocs build --clean