[POC] Add TypeScript infra based on babel preset

client/.babelrc

@@ -7,7 +7,8 @@
       ],
       "useBuiltIns": "usage"
     }],
-    "@babel/preset-react"
+    "@babel/preset-react",
+    "@babel/preset-typescript"
   ],
   "plugins": [
     "@babel/plugin-proposal-class-properties",

client/tsconfig.json

@@ -0,0 +1,35 @@
+{
+  "compilerOptions": {
+    // Target latest version of ECMAScript.
+    "target": "esnext",
+    // Search under node_modules for non-relative imports.
+    "moduleResolution": "node",
+    // Process & infer types from .js files.
+    "allowJs": true,
+    // Don't emit; allow Babel to transform files.
+    "noEmit": true,
+    // Enable strictest settings like strictNullChecks & noImplicitAny.
+    "strict": true,
+    // Import non-ES modules as default imports.
+    "esModuleInterop": true,
+    "jsx": "react",
+    "allowSyntheticDefaultImports": true,
+    "noUnusedLocals": true,
+    "lib": [
+      "dom",
+      "dom.iterable",
+      "esnext"
+    ],
+    "forceConsistentCasingInFileNames": true,
+    "baseUrl": "./",
+    "paths": {
+      "@/*": ["./app/*"]
+    }
+  },
+  "include": [
+    "app/**/*"
+  ],
+  "exclude": [
+    "dist"
+  ]
+}