chore: update Docker build and dependencies

- Add .dockerignore for runtime state files (sqlite, logs, secrets)
- Bump Node.js base image from 18 to 20
- Add @types/better-sqlite3 dev dependency

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.dockerignore

@@ -2,3 +2,21 @@
 .github
 build
 node_modules
+
+# Runtime state files (should not be baked into image)
+*.sqlite
+*.sqlite-journal
+*.sqlite-wal
+*.sqlite-shm
+*.db
+admin.connect
+admin.enroll
+admin.npub
+app.nprofile
+.jwt_secret
+
+# Runtime data directories
+metric_cache/
+metric_events/
+bundler_events/
+logs/

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:18
+FROM node:20
 
 WORKDIR /app
 

package.json

@@ -77,6 +77,7 @@
     "zip-a-folder": "^3.1.9"
   },
   "devDependencies": {
+    "@types/better-sqlite3": "^7.6.13",
     "@types/chai": "^4.3.4",
     "@types/chai-string": "^1.4.5",
     "@types/cors": "^2.8.17",