Add Dockerfile

This commit also disable the docker building process performed by
 goreleaser. Docker containers are built now by hub.docker.com.

.goreleaser.yml

@@ -16,13 +16,6 @@ builds:
     - arm
     - arm64
 
-dockers:
--
-  dockerfile: Dockerfile.goreleaser
-  image_templates:
-    - "mempool/mempool-cli:latest"
-    - "mempool/mempool-cli:{{ .Tag }}"
-
 archives:
 - replacements:
     linux: Linux

Dockerfile

@@ -0,0 +1,10 @@
+FROM golang:1.14-alpine
+RUN apk --no-cache add ca-certificates
+WORKDIR /src
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o mempool-cli .
+
+FROM scratch
+COPY --from=0 /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=0 /src/mempool-cli /
+ENTRYPOINT ["/mempool-cli"]

Dockerfile.goreleaser

@@ -1,7 +0,0 @@
-FROM alpine as certs
-RUN apk --no-cache add ca-certificates
-
-FROM scratch
-COPY --from=certs /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
-COPY mempool-cli /
-ENTRYPOINT ["/mempool-cli"]