update test script

Author: jatinkatyal13

package.json

@@ -37,7 +37,7 @@
     "build": "tsc",
     "prestart": "npm run build",
     "start": "./wait-for-it.sh ${AMQP_HOST}:${AMQP_PORT} -- node dist/taskmaster.js",
-    "test": "mocha --timeout 10000 --exit --require ts-node/register test/**/*.ts",
+    "test": "docker build . -t codingblocks/judge-taskmaster && mocha --timeout 10000 --exit --require ts-node/register test/**/*.ts",
     "test.parallel": "mocha-parallel-tests --timeout 10000 --exit --require ts-node/register test/**/*.ts",
     "cover": "nyc npm test"
   },