replaced .travis.yml with multistage Docker build

.travis.yml

@@ -1,27 +0,0 @@
-language: go
-
-# Force-enable Go modules. This will be unnecessary when Go 1.12 lands.
-env:
-- GO111MODULE=on
-
-# You don't need to test on very old version of the Go compiler. It's the user's
-# responsibility to keep their compilers up to date.
-go:
-- 1.11.x
-
-# Only clone the most recent commit.
-git:
-  depth: 1
-
-# Skip the install step. Don't `go get` dependencies. Only build with the code
-# in vendor/
-install: true
-
-notifications:
-  email: false
-
-before_script:
-- go install -mod vendor github.com/mitchellh/gox
-
-script:
-- gox -output="hetzner-sb-notifier_{{.OS}}_{{.Arch}}"

Dockerfile

@@ -0,0 +1,20 @@
+FROM golang:alpine as builder
+
+RUN apk update && apk add git && apk add ca-certificates
+RUN adduser -D -g '' appuser
+RUN mkdir /hetzner-sb-notifier
+COPY . /hetzner-sb-notifier/
+WORKDIR /hetzner-sb-notifier
+
+ENV VERSION=1.0
+RUN chmod +x build.sh
+
+RUN /hetzner-sb-notifier/build.sh linux
+
+FROM scratch
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=builder /etc/passwd /etc/passwd
+COPY --from=builder /hetzner-sb-notifier/build/hetzner-sb-notifier_linux_amd64 /hetzner-sb-notifier
+RUN chmod +x hetzner-sb-notifier
+USER appuser
+ENTRYPOINT ["/hetzner-sb-notifier"]

build.sh

@@ -0,0 +1,4 @@
+GO111MODULE=on
+go get github.com/mitchellh/gox
+go get ./...
+gox -output="build/hetzner-sb-notifier_{{.OS}}_{{.Arch}}_${VERSION}" -osarch=$1/amd64