Disable signups, minor fixes

package.json

@@ -55,9 +55,9 @@
     "jimp": "^0.13.0",
     "jquery": "^3.5.0",
     "kcors": "^2.2.2",
-    "koa": "^2.11.0",
+    "koa": "^2.13.4",
     "koa-bodyparser": "^4.3.0",
-    "koa-compress": "~4.0.1",
+    "koa-compress": "~5.1.0",
     "koa-csrf": "^3.0.8",
     "koa-error": "^3.2.0",
     "koa-favicon": "~2.1.0",
@@ -75,7 +75,7 @@
     "moment": "^2.24.0",
     "mz": "^2.7.0",
     "node-fetch": "^2.3.0",
-    "node-sass": "^4.14.0",
+    "node-sass": "^7.0.0",
     "node-uuid": "^1.4.8",
     "passwords": "^1.3.1",
     "pg": "^8.0.3",