Update docker/dockerfile Docker tag to v1.20

Bumps [node-forge](https://github.com/digitalbazaar/forge) from 1.3.1 to 1.3.2.
- [Changelog](https://github.com/digitalbazaar/forge/blob/main/CHANGELOG.md)
- [Commits](https://github.com/digitalbazaar/forge/compare/v1.3.1...v1.3.2)

---
updated-dependencies:
- dependency-name: node-forge
  dependency-version: 1.3.2
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

backend/Dockerfile

@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.19
+# syntax=docker/dockerfile:1.20
 FROM cgr.dev/chainguard/go:latest as build
 
 WORKDIR /src

package-lock.json

@@ -10705,9 +10705,9 @@
       }
     },
     "node_modules/node-forge": {
-      "version": "1.3.1",
+      "version": "1.3.2",
-      "resolved": "https://registry.npmjs.org/node-forge/-/node-forge-1.3.1.tgz",
+      "resolved": "https://registry.npmjs.org/node-forge/-/node-forge-1.3.2.tgz",
-      "integrity": "sha512-dPEtOeMvF9VMcYV/1Wb8CPoVAXtp6MKMlcbAt4ddqmGqUJ6fQZFXkNZNkNlfevtNkGtaSoXf/vNNNSvgrdXwtA==",
+      "integrity": "sha512-6xKiQ+cph9KImrRh0VsjH2d8/GXA4FIMlgU4B757iI1ApvcyA9VlouP0yZJha01V+huImO+kKMU7ih+2+E14fw==",
       "dev": true,
       "license": "(BSD-3-Clause OR GPL-2.0)",
       "engines": {