Update Go to 1.11 & circleci configs

Author: jviide

.circleci/config.yml

@@ -0,0 +1,46 @@
+version: 2
+jobs:
+  build:
+    docker:
+      - image: docker:18.06.1-ce-git
+    working_directory: ~/whereabouts
+    steps:
+      - checkout
+      - setup_remote_docker:
+          version: 18.05.0-ce
+      - run: docker build --pull -t ${DOCKER_HUB_IMAGE} .
+      - run: mkdir -p workspace
+      - run: docker save ${DOCKER_HUB_IMAGE} | gzip > image.tar.gz
+      - persist_to_workspace:
+          root: workspace
+          paths:
+            - image.tar.gz
+  deploy:
+    docker:
+      - image: docker:18.06.1-ce
+    working_directory: ~/whereabouts
+    steps:
+      - attach_workspace:
+          at: workspace
+      - setup_remote_docker:
+          version: 18.05.0-ce
+      - deploy:
+          name: Deploy the image to Docker Hub
+          command: |
+            zcat workspace/image.tar.gz | docker load
+            docker tag ${DOCKER_HUB_IMAGE} ${DOCKER_HUB_IMAGE}:${CIRCLE_TAG}
+            docker login -u ${DOCKER_HUB_USER} -p ${DOCKER_HUB_PASS}
+            docker push ${DOCKER_HUB_IMAGE}:${CIRCLE_TAG}
+            docker push ${DOCKER_HUB_IMAGE}
+
+workflows:
+  version: 2
+  build-and-deploy:
+    jobs:
+      - build
+      - deploy:
+          required:
+            - build
+          filters:
+            tags:
+              only: /^v[0-9]+\.[0-9]+\.[0-9]+$/

Dockerfile

@@ -1,9 +1,9 @@
-FROM golang:1.8-alpine AS builder
+FROM golang:1.11-alpine AS builder
 WORKDIR /go/src/whereabouts
 COPY . .
 RUN CGO_ENABLED=0 go build -o /whereabouts -ldflags="-s -w"
 
-FROM alpine:3.6
+FROM alpine:3.8
 RUN apk --no-cache add ca-certificates
 COPY --from=builder /whereabouts /
 RUN adduser -D app && chown app:app /whereabouts