some cleanup, split backend and frontend

backend/tsconfig.json

@@ -0,0 +1,31 @@
+{
+    "compilerOptions": {
+        "lib": [
+            "es2017"
+        ],
+        "target": "es2017",
+        "module": "commonjs",
+        "moduleResolution": "node",
+        "outDir": "./dist",
+        "emitDecoratorMetadata": true,
+        "experimentalDecorators": true,
+        "sourceMap": true,
+        "noImplicitAny": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "skipLibCheck": true,
+        "baseUrl": "./src",
+        "paths": {
+            "~*": [
+                "./*"
+            ]
+        }
+    },
+    "include": [
+        "./src/**/*.ts",
+        "./tests/**/*.ts",
+    ],
+    "exclude": [
+        "frontend"
+    ]
+}