Merge pull request #128 from heetch/004-fix-dockerfile

Fix Dockerfile to work with modules

Dockerfile

@@ -1,13 +1,8 @@
-FROM golang:1.12-alpine as builder
+FROM golang:1.13-alpine as builder
 
-ADD https://github.com/golang/dep/releases/download/v0.5.0/dep-linux-amd64 /usr/bin/dep
-RUN chmod +x /usr/bin/dep
-RUN apk --no-cache --update add git
-WORKDIR $GOPATH/src/github.com/heetch/regula
-COPY Gopkg.toml Gopkg.lock ./
-RUN dep ensure --vendor-only
-COPY . ./
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o /regula ./cmd/regula
+WORKDIR /src/regula
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o /regula ./cmd/regula
 RUN chmod +x /regula
 CMD ["/regula"]