Reorganize frontend and install Craco to alias modules (#190)

front/craco.config.js

@@ -0,0 +1,20 @@
+const path = require("path");
+
+module.exports = {
+  webpack: {
+    alias: {
+      '~': path.resolve(__dirname, 'src'),
+      '@': path.resolve(__dirname, 'src/modules'),
+      '@testing': path.resolve(__dirname, 'src/testing'),
+    }
+  },
+  jest: {
+    configure: {
+      "moduleNameMapper": {
+        '~/(.+)': "<rootDir>/src/$1",
+        '@/(.+)': "<rootDir>/src/modules/$1",
+        '@testing/(.+)': "<rootDir>/src/testing/$1",
+      }
+    }
+  },
+};