feat(server) user-defined storage structure (#1098)

[Breaking] newly uploaded file will conform to the default structure of `{uploadLocation}/{userId}/year/year-month-day/filename.ext`

server/libs/storage/tsconfig.lib.json

@@ -0,0 +1,9 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "declaration": true,
+    "outDir": "../../dist/libs/storage"
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist", "test", "**/*spec.ts"]
+}