Dockerizing. Fixes #7 (#8)

Author: joanlopez

Dockerfile

@@ -0,0 +1,15 @@
+FROM golang:alpine AS build
+
+LABEL MAINTAINER = 'Friends of Go (it@friendsofgo.tech)'
+
+RUN apk add --update git
+WORKDIR /go/src/github.com/friendsofgo/killgrave
+COPY . .
+RUN export GO111MODULE=on && go mod tidy && TAG=$(git describe --tags --abbrev=0) \
+    && LDFLAGS=$(echo "-s -w -X main.version="$TAG) \
+    && CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o /go/bin/killgrave -ldflags "$LDFLAGS" cmd/killgrave/main.go
+
+# Building image with the binary
+FROM scratch
+COPY --from=build /go/bin/killgrave /go/bin/killgrave
+ENTRYPOINT ["/go/bin/killgrave"]

README.md

@@ -155,6 +155,18 @@ curl --header "Content-Type: application/json" \
   http://localhost:3000/gophers
 ```
 
+### Docker
+
+The application is also available through [Docker](https://hub.docker.com/r/friendsofgo/killgrave), just run:
+
+```bash
+docker run -it --rm -p 3000:3000 friendsofgo/killgrave
+```
+
+Remember to use the [-p](https://docs.docker.com/engine/reference/run/) flag to expose the container port where the application is listening (3000 by default).
+
+NOTE: If you want to use `killgrave` through Docker at the same time you use your own dockerised HTTP-based API, be careful with networking issues.
+
 ## Features
 * Imposters created in json
 * Validate json schemas on requests