Preparing Your Service Provider Environment

Now to move on to prepare our development environment for the Service Provider code. Create a directory for it:

# run this from the root of `simple-service-provider/`
mkdir service-provider
cd service-provider

Create a package.json:

npm init

Inside your newly generated package.json, paste in the following code:

{
    "name": "service-provider",
    "version": "1.0.0",
    "description": "",
    "main": "index.js",
    "scripts": {
        "start:dev": "nodemon",
        "test": "echo \"Error: no test specified\" && exit 1"
    },
    "devDependencies": {
        "@types/node": "^18.14.0",
        "@types/ws": "^8.5.4",
        "nodemon": "^2.0.20",
        "ts-node": "^10.9.1",
        "typescript": "^4.8.4"
    },
    "author": "",
    "license": "ISC",
    "dependencies": {
        "ws": "^8.12.0"
    }
}

install dependecies:

npm install

create a tsconfig.json file containing the following:

{
    "compilerOptions": {
    "target": "es2017", 
    "lib": [
        "es6"
    ],
    "module": "Node16", 
    "rootDir": "src", 
    "resolveJsonModule": true, 
    "allowJs": true,                      
    "outDir": "build", 
    "esModuleInterop": true, 
    "forceConsistentCasingInFileNames": true, 
    "strict": true, 
    "noImplicitAny": true, 
    "skipLibCheck": true 
    }
}

You will use Nodemon to reload your app on code changes. Create a nodemon.json file in the same directory which will act as our nodemon configuration. Paste in the following code inside that file:

{
    "watch": [
        "src"
    ],
    "ext": ".ts,.js",
    "ignore": [],
    "exec": "ts-node ./src/index.ts"
}

Finally, create a typescript file for our app logic:

mkdir src
touch src/index.ts

At this point your directory should look like this (check yourself with tree -L 2 simple-service-provider):

simple-service-provider
├── service-provider
│   ├── node_modules
│   ├── nodemon.json
│   ├── package.json
│   ├── package-lock.json
│   ├── src
│   └── tsconfig.json
└── user-client
    ├── node_modules
    ├── package.json
    ├── package-lock.json
    ├── src
    └── tsconfig.json

7 directories, 7 files

And service-provider/src/ should look like this:

service-provider/src
└── index.ts

1 directory, 1 file

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Preparing Your Service Provider Environment