feat: migrate voice app, add otel/rum, dockerfile, k8s deployment with ingress

Dockerfile

@@ -0,0 +1,28 @@
+ARG APP_RELEASE=dev
+
+FROM node:22-alpine AS app
+
+WORKDIR /app
+
+COPY package*.json ./
+
+RUN npm ci --omit=dev
+
+COPY server.js tracing.js ./
+COPY public/ ./public/
+
+# Inject build release into index.html if APP_RELEASE is specified
+ARG APP_RELEASE
+ENV APP_RELEASE=${APP_RELEASE}
+RUN if [ -n "${APP_RELEASE}" ]; then \
+      sed -i "s/window.__APP_RELEASE__ || \"dev\"/\"${APP_RELEASE}\"/g" ./public/index.html; \
+    fi
+
+ENV PORT=8080 \
+    HOST=0.0.0.0
+
+EXPOSE 8080
+
+USER node
+
+CMD ["node", "server.js"]