Merge branch 'dev' of https://git.phc.dm.unipi.it/phc/problemi into dev

package.json

@@ -25,6 +25,7 @@
         "http-status-codes": "^2.2.0",
         "katex": "^0.16.3",
         "morgan": "^1.10.0",
+        "node-fetch": "^3.3.0",
         "preact": "^10.11.2",
         "preact-render-to-string": "^5.2.6",
         "preact-router": "^4.1.0",
@@ -34,6 +35,7 @@
         "remark-parse": "^10.0.1",
         "remark-rehype": "^10.1.0",
         "sass": "^1.55.0",
+        "simple-oauth2": "^5.0.0",
         "unified": "^10.1.2",
         "url-pattern": "^1.0.3",
         "vite": "^3.2.2"
@@ -43,6 +45,7 @@
         "@types/express": "^4.17.14",
         "@types/morgan": "^1.9.3",
         "@types/node": "^18.11.9",
+        "@types/simple-oauth2": "^4.1.1",
         "concurrently": "^7.5.0",
         "esbuild": "^0.15.13",
         "npm-run-all": "^4.1.5",