Migrate CI to travis

- Add travis build file
- Use golang alpine image
- Clean scripts a little bit
- Disable CGO for test-integration >_<

script/deploy.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+set -e
+
+curl -LO https://github.com/tcnksm/ghr/releases/download/pre-release/linux_amd64.zip
+unzip -q linux_amd64.zip
+sudo mv grh /usr/bin/ghr
+sudo chmod +x /usr/bin/ghr
+
+ghr -t $GITHUB_TOKEN -u emilevauge -r traefik --prerelease ${VERSION} dist/
+docker login -e $DOCKER_EMAIL -u $DOCKER_USER -p $DOCKER_PASS
+docker push ${REPO,,}:latest
+docker tag ${REPO,,}:latest ${REPO,,}:${VERSION}
+docker push ${REPO,,}:${VERSION}