feat: switch to global_healthx Ozonetel account, add Dockerfile

- Update default campaign to Inbound_918041763265
- Add Dockerfile and .dockerignore for container deployment
- Sidecar image: 043728036361.dkr.ecr.ap-south-1.amazonaws.com/fortytwo-eap/helix-engage-sidecar:alpha

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

Dockerfile

@@ -0,0 +1,7 @@
+FROM node:22-slim
+WORKDIR /app
+COPY dist ./dist
+COPY node_modules ./node_modules
+COPY package.json ./
+EXPOSE 4100
+CMD ["node", "dist/main.js"]