DUNGEONS-30: add access gateway with Telegram and Discord approvals

Co-authored-by: multica-agent <github@multica.ai>

Dockerfile

@@ -0,0 +1,13 @@
+FROM node:22-alpine
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci --omit=dev --no-fund && mkdir -p /app/data && chown node:node /app/data
+COPY --chown=node:node src ./src
+COPY --chown=node:node public ./public
+COPY --chown=node:node scripts ./scripts
+ENV NODE_ENV=production HOST=0.0.0.0 PORT=8080 DATA_FILE=/app/data/access.json
+USER node
+EXPOSE 8080
+VOLUME ["/app/data"]
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s CMD node -e "fetch('http://127.0.0.1:'+process.env.PORT+'/_access/health').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"
+CMD ["node", "src/index.js"]