Switch from Travis to GitHub actions (#5)

.github/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: Continuous Integration
+
+on:
+  push:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Build the Docker image
+      run: docker build . --file Dockerfile --tag hepdata-converter-ws
+    - name: Deploy
+      if: contains(github.ref, 'master') || github.event_name == 'release'
+      env:
+        CI_TAG: ${{ github.event.release.tag_name }}
+        IMAGE_NAME: hepdata-converter-ws
+        IMAGE_NAME_REMOTE: hepdata/hepdata-converter-ws
+        DOCKERHUB_USER: ${{ secrets.DOCKERHUB_USER }}
+        DOCKERHUB_TOKEN: ${{ secrets.DOCKERHUB_TOKEN }}
+      run: |
+        bash docker_push

README.md

@@ -1,5 +1,5 @@
 
-![Build Status](https://travis-ci.org/HEPData/hepdata-converter-ws-docker.svg?branch=master)
+[![GitHub Actions Status](https://github.com/HEPData/hepdata-converter-ws-docker/workflows/Continuous%20Integration/badge.svg?branch=master)](https://github.com/HEPData/hepdata-converter-ws-docker/actions?query=branch%3Amaster)
 
 # hepdata-converter-ws-docker
 

docker_push

@@ -1,5 +1,5 @@
 #!/bin/bash
-TAG_NAME="${TRAVIS_TAG:-latest}"
+TAG_NAME="${CI_TAG:-latest}"
 docker tag $IMAGE_NAME $IMAGE_NAME_REMOTE:$TAG_NAME
-echo "$DOCKER_PASSWORD" | docker login --username=$DOCKER_USERNAME --password-stdin
-docker push $IMAGE_NAME_REMOTE:$TAG_NAME
+echo "$DOCKERHUB_TOKEN" | docker login --username=$DOCKERHUB_USER --password-stdin
+docker push $IMAGE_NAME_REMOTE:$TAG_NAME