updating configs for coverage report generation

.babelrc

@@ -0,0 +1,7 @@
+{
+    "presets": [
+      ["@babel/preset-env", { "targets": { "node": "current" } }],
+      "@babel/preset-typescript"
+    ]
+  }
+

jest.config.js

@@ -3,7 +3,19 @@ module.exports = {
     testEnvironment: 'node',
     testMatch: ['**/__tests__/**/*.test.ts'],
     moduleNameMapper: {
-        '^@/(.*)$': '<rootDir>/src/$1'
+      '^@/(.*)$': '<rootDir>/src/$1'
     },
     testTimeout: 20000,
-};
+    collectCoverage: true,
+    coverageDirectory: 'coverage',
+    coverageReporters: ['text', 'lcov'],
+    coveragePathIgnorePatterns: [
+      "/node_modules/",
+      "/dist/",
+      "/src/server.js" 
+    ],
+    transform: {
+      "^.+\\.(ts|tsx)$": "ts-jest",
+    },
+  };
+

package.json

@@ -4,7 +4,7 @@
   "description": "JSON RPC server for Shardeum",
   "main": "src/server.js",
   "scripts": {
-    "test": "NODE_ENV=test jest --detectOpenHandles --silent",
+    "test": "NODE_ENV=test jest --detectOpenHandles --silent --forceExit",
     "start": "npm run compile && node dist/src/server.js",
     "dev": "nodemon",
     "compile": "tsc -p .",
@@ -13,7 +13,8 @@
     "lint-windows": "eslint ./src/**/*.ts",
     "update-docker-dev": "docker build -t registry.gitlab.com/shardeum/json-rpc-server:dev . --push",
     "format-check": "prettier --check './src/**/*.ts'",
-    "local:test": "bash run_tests.sh"
+    "local:test": "bash run_tests.sh",
+    "coverage": "jest --coverage --detectOpenHandles --forceExit --silent"
   },
   "author": "thantsintoe",
   "license": "ISC",