tsconfig.json

{
    "compilerOptions": {
        "allowJs": true,
        "outDir": "build",
        "resolveJsonModule": true,                        /* Enable importing .json files */
		"preserveConstEnums": true, 
		"forceConsistentCasingInFileNames": true,
		"strictBindCallApply": true,                      /* Check that the arguments for `bind`, `call`, and `apply` methods match the original function. */
		"strictPropertyInitialization": false,            /* Check for class properties that are declared but not set in the constructor. */
		"exactOptionalPropertyTypes": false,               /* Interpret optional property types as written, rather than adding 'undefined'. */
		"noFallthroughCasesInSwitch": true,               /* Enable error reporting for fallthrough cases in switch statements. */
		"noUncheckedIndexedAccess": true,                 /* Include 'undefined' in index signature results */
		"noImplicitOverride": true,                       /* Ensure overriding members in derived classes are marked with an override modifier. */
		"noPropertyAccessFromIndexSignature": true,       /* Enforces using indexed accessors for keys declared using an indexed type */
		"typeRoots": ["./node_module/@types", "./src/types"],
		"types": ["node", "jest"],                                    
		"noEmitOnError": true,                            
		"module": "commonjs",
		"esModuleInterop": true,
		"target": "ES6",
		"skipLibCheck": true ,                       
		"alwaysStrict":true,
		"checkJs": true,
		"sourceMap": true,
		"strictNullChecks": false,              
		"strictFunctionTypes": true,           
		"emitDecoratorMetadata": true,
		"experimentalDecorators": true,
		"removeComments": true,
		"allowSyntheticDefaultImports": true,
		"incremental": true,
		"allowUnreachableCode": true,
		"allowUnusedLabels": true,
		"noImplicitReturns": true,
		"noUnusedLocals": true,
		"noUnusedParameters": true, 
		"pretty": true,
		"strict": true,
		"noImplicitAny": true,
		"importHelpers": true,
		"moduleResolution": "node",  
		"baseUrl": "./",   
    },
    "include": ["./src/**/*.ts"],
	"exclude": ["node_modules", "**/*.spec.ts","**/*.test.ts"],
	"ts-node": {
		"files": true
	 },
	// "files": ["./src/types/custom.d.ts"],
  }