Fix build: sync package-lock.json (missing yaml@2.8.3)

npm ci was failing because package-lock.json was out of sync with
package.json — yaml@2.8.3 was missing from the lock file.
Revert Dockerfile back to node:20-slim.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:20
+FROM node:20-slim
 
 WORKDIR /app
 
@@ -6,7 +6,7 @@ COPY package.json package-lock.json ./
 RUN npm ci --omit=dev
 
 COPY . .
-RUN NODE_OPTIONS=--openssl-legacy-provider CI=false npm run build
+RUN npm run build
 
 ENV NODE_ENV=production
 ENV PORT=7860

package-lock.json

@@ -16182,6 +16182,23 @@
         }
       }
     },
+    "node_modules/tailwindcss/node_modules/yaml": {
+      "version": "2.8.3",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.8.3.tgz",
+      "integrity": "sha512-AvbaCLOO2Otw/lW5bmh9d/WEdcDFdQp2Z2ZUH3pX9U2ihyUY0nvLv7J6TrWowklRGPYbB/IuIMfYgxaCPg5Bpg==",
+      "license": "ISC",
+      "optional": true,
+      "peer": true,
+      "bin": {
+        "yaml": "bin.mjs"
+      },
+      "engines": {
+        "node": ">= 14.6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/eemeli"
+      }
+    },
     "node_modules/tapable": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/tapable/-/tapable-2.3.0.tgz",