Publish binary artifacts to GitHub

Signed-off-by: Amir Zarrinkafsh <nightah@me.com>

.travis.yml

@@ -38,7 +38,6 @@ jobs:
     - stage: test
       script:
         - authelia-scripts --log-level debug ci
-      # TODO(c.michaud): publish built artifact on Github.
     - &build-images
       stage: build images
       env:
@@ -50,6 +49,17 @@ jobs:
         - kill %1
       after_success:
         - authelia-scripts docker push-image --arch=$ARCH
+        - if [[ $TRAVIS_TAG ]]; then docker create --name authelia-binary clems4ever/authelia:$TRAVIS_TAG-$ARCH && docker cp authelia-binary:/usr/app/authelia ./authelia-linux-$ARCH && docker cp authelia-binary:/usr/app/public_html ./ && tar -czf authelia-linux-$ARCH.tar.gz authelia-linux-$ARCH public_html; fi
+      before_deploy:
+        - echo Deploying Authelia $TRAVIS_TAG-$ARCH to GitHub Releases
+      deploy:
+        provider: releases
+        api_key: '$GITHUB_API_KEY'
+        file_glob: true
+        file: 'authelia-linux-$ARCH.tar.gz'
+        skip_cleanup: true
+        on:
+          tags: true
     - <<: *build-images
       env:
         - ARCH=arm32v7