Added Dockerfile & docker-compose

Dockerfile

@@ -0,0 +1,12 @@
+FROM golang:alpine as builder
+
+WORKDIR /go/src/github.com/cooperspencer/gickup
+COPY . .
+
+RUN go get -d -v ./...
+RUN CGO_ENABLED=0 go build -a -installsuffix cgo -o app .
+
+FROM scratch as production
+WORKDIR /
+COPY --from=builder /go/src/github.com/cooperspencer/gickup/app /gickup/app
+CMD ["./gickup/app"]

docker-compose.yml

@@ -0,0 +1,8 @@
+version: "3"
+services:
+  runner:
+    build: .
+    # image: cooperspencer/gickup:latest # TODO: Enable the Build in Docker Hub
+    volumes:
+      - ${PWD}/config.yml:/gickup/config.yml
+    command: ["./gickup/app", "/gickup/config.yml"]