Adding support for "readableBy" and "writableBy" in back

This means that we are now loading maps from server side.

back/package.json

@@ -40,6 +40,7 @@
   },
   "homepage": "https://github.com/thecodingmachine/workadventure#readme",
   "dependencies": {
+    "@workadventure/tiled-map-type-guard": "^1.0.0",
     "axios": "^0.21.1",
     "busboy": "^0.3.1",
     "circular-json": "^0.5.9",
@@ -47,6 +48,7 @@
     "generic-type-guard": "^3.2.0",
     "google-protobuf": "^3.13.0",
     "grpc": "^1.24.4",
+    "ipaddr.js": "^2.0.1",
     "jsonwebtoken": "^8.5.1",
     "mkdirp": "^1.0.4",
     "prom-client": "^12.0.0",