added testing commands

Author: Sylvestre Gug

package.json

@@ -40,7 +40,10 @@
   },
   "scripts": {
     "dev": "NODE_ENV=development nodemon bin/observable-database-proxy",
-    "test:local": "mocha"
+    "test": "mocha",
+    "test:local": "docker-compose -f docker-compose.yml -f docker-compose.local.yml up --build",
+    "test:ci": "docker-compose -f docker-compose.yml up --build --exit-code-from test",
+    "test:db": "docker-compose -f docker-compose.yml -f docker-compose.local.yml up mssql"
   },
   "author": "Observable",
   "license": "ISC",