Add Dockerfile for container build

.drone.yml

@@ -15,3 +15,12 @@ steps:
   - golangci-lint -v run
   environment:
     GOFLAGS: -mod=vendor
+- name: build
+  image: plugins/docker
+  settings:
+    username:
+      from_secret: registry_user
+    password:
+      from_secret: registry_password
+    repo: fat0troll/fwzookeeper_helper
+    auto_tag: true

Dockerfile

@@ -0,0 +1,14 @@
+FROM fat0troll/tdlib-golangci AS builder
+
+COPY . /build/
+WORKDIR /build/
+
+RUN CGO_ENABLED=1 GOOS=linux GOARCH=amd64 GOFLAGS='-mod=vendor' go build -ldflags '-w -extldflags "-static"'
+
+FROM scratch
+
+COPY --from=builder /build/fwzookeeper_helper /usr/local/bin/fw_zookeeper_helper
+
+VOLUME ["/data"]
+
+ENTRYPOINT [ "/usr/local/bin/fw_zookeeper_helper" ]