add docker image builds to ci

.circleci/config.yml

@@ -25,3 +25,14 @@ jobs:
           path: ./bin/
           destination: /artifacts/
       - run: ./make_release.sh
+
+      - setup_remote_docker:
+          version: 18.09.3
+      - docker/check
+      - docker/build:
+          image: $CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME
+          tag: latest,v$CIRCLE_BUILD_NUM
+          extra_build_args: "--build-arg=BUILD_NUM=$CIRCLE_BUILD_NUM"
+      - docker/push:
+          image: $CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME
+          tag: latest,v$CIRCLE_BUILD_NUM

README.md

@@ -5,6 +5,8 @@
 [![release](https://img.shields.io/github/v/release/nektro/aquila)](https://github.com/nektro/aquila/releases/latest)
 [![goreportcard](https://goreportcard.com/badge/github.com/nektro/aquila)](https://goreportcard.com/report/github.com/nektro/aquila)
 [![downloads](https://img.shields.io/github/downloads/nektro/aquila/total.svg)](https://github.com/nektro/aquila/releases)
+[![docker_pulls](https://img.shields.io/docker/pulls/nektro/aquila)](https://hub.docker.com/r/nektro/aquila)
+[![docker_stars](https://img.shields.io/docker/stars/nektro/aquila)](https://hub.docker.com/r/nektro/aquila)
 
 A federated package repository and CI system for the Zig programming language.