Add Docker build files

.drone.yml

@@ -25,3 +25,20 @@ steps:
     - curl -sL https://git.io/goreleaser | bash
   when:
     event: tag
+- name: build docker image
+  image: plugins/docker
+  settings:
+    username:
+      from_secret: username
+    password:
+      from_secret: password
+    repo: registry.git.tdem.in/gmnhg
+    registry: registry.git.tdem.in
+    dockerfile: Dockerfile
+    tags:
+      - ${DRONE_TAG}
+      - latest
+  when:
+    event:
+    - tag
+

Dockerfile

@@ -0,0 +1,23 @@
+FROM golang:1.15-alpine AS builder
+
+WORKDIR /src
+
+ENV CGO_ENABLED=0
+ENV GO111MODULE=on
+ENV GOFLAGS="-trimpath -ldflags=-linkmode=external"
+
+RUN apk add --no-cache git gcc musl-dev
+
+COPY . /src/
+
+RUN \
+    go build -v -o /tmp/gmnhg ./cmd/gmnhg && \
+    go build -v -o /tmp/md2gmn ./cmd/md2gmn
+
+FROM alpine:3.12 AS runner
+
+LABEL maintainer "Timur Demin <me@tdem.in>"
+
+COPY --from=builder /tmp/gmnhg /tmp/md2gmn /bin/
+
+CMD ["/bin/sh"]