Initial config with a few files that build on client and server side.

buildtools/tsconfig-base.json

@@ -0,0 +1,20 @@
+{
+  "compilerOptions": {
+    "target": "es2016",
+    "module": "commonjs",
+    "strict": true,
+    "strictPropertyInitialization": false,
+    "sourceMap": true,
+    "noImplicitAny": true,
+    "noUnusedLocals": true,
+    "moduleResolution": "node",
+    "baseUrl": "..",
+    "composite": true,
+    "plugins": [{
+      "name": "typescript-tslint-plugin"
+    }],
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "jsx": "react"
+  }
+}