Try github action push build

.github/workflows/push.yml

@@ -0,0 +1,10 @@
+name: CI
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - run: docker build -t test .

.travis.yml

@@ -1,10 +0,0 @@
-sudo: required
-services:
-  - docker
-
-language: go
-go:
-  - "1.13"
-
-# a bit strange but want to reuse the test Dockerfile
-script: docker build --build-arg GO_VERSION=$(go version | cut -d' ' -f 3 | cut -b 3-) .