fix: security update

Dockerfile

@@ -9,7 +9,7 @@
 # #
 # #
 
-FROM docker.io/library/node:20-alpine AS build_node_modules
+FROM docker.io/library/node:20-alpine@sha256:77516e190b36147a51d2d1b85b52f57592fe956b1dbeea57a3d618a0affd5104 AS build_node_modules
 
 # Copy Web UI
 COPY src/ /app/
@@ -18,7 +18,7 @@ RUN npm ci --production
 
 # Copy build result to a new image.
 # This saves a lot of disk space.
-FROM docker.io/library/node:20-alpine
+FROM docker.io/library/node:20-alpine@sha256:77516e190b36147a51d2d1b85b52f57592fe956b1dbeea57a3d618a0affd5104
 COPY --from=build_node_modules /app /app
 
 # Move node_modules one directory up, so during development

src/package.json

@@ -13,7 +13,7 @@
   "license": "GPL",
   "dependencies": {
     "debug": "^4.3.1",
-    "express": "^4.17.1",
+    "express": "^4.18.2",
     "express-session": "^1.17.1",
     "qrcode": "^1.4.4",
     "uuid": "^8.3.2"
@@ -28,6 +28,6 @@
     ]
   },
   "engines": {
-    "node": "14"
+    "node": "20"
   }
 }