Reintroduces alpine based docker image

Closes #703

.circleci/config.yml

@@ -63,6 +63,7 @@ jobs:
       - setup_remote_docker:
           version: 17.10.0-ce
       - run: docker build -f Dockerfile -t hydra-test .
+      - run: docker build -f Dockerfile-alpine -t hydra-test-alpine .
       - run: docker run hydra-test help
 
   release:
@@ -84,8 +85,10 @@ jobs:
       - run: ghr -t $GITHUB_TOKEN -u $CIRCLE_PROJECT_USERNAME -r $CIRCLE_PROJECT_REPONAME --replace `git describe --tags` dist/
       # Build and push docker image
       - run: docker build --build-arg git_tag=$(git describe --tags) --build-arg git_commit=$(git rev-parse HEAD) -f Dockerfile -t oryd/hydra:$CIRCLE_TAG .
+      - run: docker build --build-arg git_tag=$(git describe --tags) --build-arg git_commit=$(git rev-parse HEAD) -f Dockerfile-alpine -t oryd/hydra:$CIRCLE_TAG-alpine .
       - run: docker login --username "$DOCKER_USERNAME" --password "$DOCKER_PASSWORD"
       - run: docker push oryd/hydra:$CIRCLE_TAG
+      - run: docker push oryd/hydra:$CIRCLE_TAG-alpine
       # Release node / JavaScript SDK
       - run: echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" >> ~/.npmrc
       - run: sudo npm i -g npm

Dockerfile-alpine

@@ -0,0 +1,27 @@
+FROM golang:1.9-alpine
+
+ARG git_tag
+ARG git_commit
+
+RUN apk add --no-cache git build-base curl
+RUN curl -L -s https://github.com/golang/dep/releases/download/v0.3.2/dep-linux-amd64 -o $GOPATH/bin/dep
+RUN chmod +x $GOPATH/bin/dep
+
+WORKDIR /go/src/github.com/ory/hydra
+
+ADD ./Gopkg.lock ./Gopkg.lock
+ADD ./Gopkg.toml ./Gopkg.toml
+RUN dep ensure -vendor-only
+
+ADD . .
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags "-s -X github.com/ory/hydra/cmd.Version=$git_tag -X github.com/ory/hydra/cmd.BuildTime=`TZ=UTC date -u '+%Y-%m-%dT%H:%M:%SZ'` -X github.com/ory/hydra/cmd.GitHash=$git_commit" -a -installsuffix cgo -o hydra
+
+FROM alpine:3.7
+
+COPY --from=0 /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=0 /go/src/github.com/ory/hydra/hydra /usr/bin/hydra
+
+ENTRYPOINT ["hydra"]
+
+CMD ["host"]

UPGRADE.md

@@ -235,6 +235,8 @@ a shell, which makes it harder to penetrate.
 Instead of relying on tags to pass arguments, it is now possible to pass command arguments such as `docker run oryd/hydra:v0.10.0 host --dangerous-force-http`
 directly.
 
+**Version 0.10.8 reintroduces an image with a shell, appended with tag `-alpine`.**
+
 ### Important Additions
 
 #### Prefixing Resources Names