File-based response support & static server

- Clean up UniversalPath implementation
    - Use Readable/Writable types correctly for stream methods
    - Add .list() methods for getting child files

- Make Response body specify explicit types and support
  writing Readable streams to the body

- Create a static file server that supports directory listing

package.json

@@ -8,12 +8,14 @@
     "lib": "lib"
   },
   "dependencies": {
+    "@atao60/fse-cli": "^0.1.6",
     "@types/bcrypt": "^5.0.0",
     "@types/busboy": "^0.2.3",
     "@types/cli-table": "^0.3.0",
+    "@types/mime-types": "^2.1.0",
     "@types/mkdirp": "^1.0.1",
     "@types/negotiator": "^0.6.1",
-    "@types/node": "^14.14.37",
+    "@types/node": "^14.17.4",
     "@types/pg": "^8.6.0",
     "@types/pluralize": "^0.0.29",
     "@types/pug": "^2.0.4",
@@ -25,6 +27,7 @@
     "cli-table": "^0.3.6",
     "colors": "^1.4.0",
     "dotenv": "^8.2.0",
+    "mime-types": "^2.1.31",
     "mkdirp": "^1.0.4",
     "negotiator": "^0.6.2",
     "pg": "^8.6.0",
@@ -38,14 +41,13 @@
     "typedoc-plugin-pages-fork": "^0.0.1",
     "typedoc-plugin-sourcefile-url": "^1.0.6",
     "typescript": "^4.2.3",
-    "copyfiles": "^2.4.1",
     "uuid": "^8.3.2"
   },
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "prebuild": "pnpm run lint",
+    "prebuild": "pnpm run lint && rimraf lib",
     "build": "tsc",
-    "postbuild": "copyfiles -u 1 \"src/resources/**/*\" lib",
+    "postbuild": "fse copy --all --dereference --preserveTimestamps --keepExisting=false --quiet --errorOnExist=false src/resources lib/resources",
     "app": "tsc && node lib/index.js",
     "prepare": "pnpm run build",
     "docs:build": "typedoc --options typedoc.json",