added project structure

backend/node_modules/@tsconfig/node12/README.md

@@ -0,0 +1,40 @@
+### A base TSConfig for working with Node 12.
+
+Add the package to your `"devDependencies"`:
+
+```sh
+npm install --save-dev @tsconfig/node12
+yarn add --dev @tsconfig/node12
+```
+
+Add to your `tsconfig.json`:
+
+```json
+"extends": "@tsconfig/node12/tsconfig.json"
+```
+
+---
+
+The `tsconfig.json`: 
+
+```jsonc
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "display": "Node 12",
+
+  "compilerOptions": {
+    "lib": ["es2019", "es2020.promise", "es2020.bigint", "es2020.string"],
+    "module": "commonjs",
+    "target": "es2019",
+
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "moduleResolution": "node"
+  }
+}
+
+```
+
+You can find the [code here](https://github.com/tsconfig/bases/blob/master/bases/node12.json).