add docker support

README.md

@@ -111,10 +111,16 @@ Monger is part of the [group of Clojure libraries known as ClojureWerkz](http://
 
 Monger uses [Leiningen 2](https://github.com/technomancy/leiningen/blob/master/doc/TUTORIAL.md). Make sure you have it installed and then run tests against
 supported Clojure versions using
-    
+
     ./bin/ci/before_script.sh
     lein all do clean, javac, test
 
+Or, if you don't have mongodb installed, you can use docker
+
+    docker-compose up
+    ./bin/ci/before_script_docker.sh
+    lein all do clean, javac, test
+
 Then create a branch and make your changes on it. Once you are done with your changes and all tests pass, submit a pull request
 on Github.
 

bin/ci/before_script_docker.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# MongoDB Java driver won't run authentication twice on the same DB instance,
+# so we need to use multiple DBs.
+docker exec mongo_test mongosh --eval 'db.createUser({"user": "clojurewerkz/monger", "pwd": "monger", roles: ["dbAdmin"], mechanisms: ["SCRAM-SHA-1"], passwordDigestor: "client"})' monger-test
+docker exec mongo_test mongosh --eval 'db.createUser({"user": "clojurewerkz/monger", "pwd": "monger", roles: ["dbAdmin"], mechanisms: ["SCRAM-SHA-1"], passwordDigestor: "client"})' monger-test2
+docker exec mongo_test mongosh --eval 'db.createUser({"user": "clojurewerkz/monger", "pwd": "monger", roles: ["dbAdmin"], mechanisms: ["SCRAM-SHA-1"], passwordDigestor: "client"})' monger-test3
+docker exec mongo_test mongosh --eval 'db.createUser({"user": "clojurewerkz/monger", "pwd": "monger", roles: ["dbAdmin"], mechanisms: ["SCRAM-SHA-1"], passwordDigestor: "client"})' monger-test4

docker-compose.yml

@@ -0,0 +1,11 @@
+# Use root/example as user/password credentials
+version: '3.1'
+
+services:
+
+  mongo:
+    image: mongo
+    container_name: mongo_test
+    restart: always
+    ports:
+      - "27017:27017"