Better runtime image (distroless)

Dockerfile

-FROM node:16-alpine3.11
+ARG NODE_VERSION=14
+
+FROM node:$NODE_VERSION-alpine3.13 as build
 
 WORKDIR /root/echo-bot
 
@@ -7,4 +9,10 @@ COPY . .
 RUN npm ci \
  && npm run build
 
-ENTRYPOINT ["node", "build/main.js"]
+FROM gcr.io/distroless/nodejs:$NODE_VERSION
+
+WORKDIR /root/echo-bot
+COPY --from=build /root/echo-bot/build build
+COPY --from=build /root/echo-bot/node_modules node_modules
+
+CMD ["build/main.js"]

package-lock.json

@@ -5,9 +5,9 @@
   "requires": true,
   "dependencies": {
     "@types/node": {
-      "version": "16.7.13",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-16.7.13.tgz",
-      "integrity": "sha512-pLUPDn+YG3FYEt/pHI74HmnJOWzeR+tOIQzUx93pi9M7D8OE7PSLr97HboXwk5F+JS+TLtWuzCOW97AHjmOXXA==",
+      "version": "16.9.1",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-16.9.1.tgz",
+      "integrity": "sha512-QpLcX9ZSsq3YYUUnD3nFDY8H7wctAhQj/TFKL8Ya8v5fMm3CFXxo8zStsLAl780ltoYoo1WvKUVGBQK+1ifr7g==",
       "dev": true
     },
     "@types/urlencode": {
@@ -105,9 +105,9 @@
       }
     },
     "typescript": {
-      "version": "4.4.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.4.2.tgz",
-      "integrity": "sha512-gzP+t5W4hdy4c+68bfcv0t400HVJMMd2+H9B7gae1nQlBzCqvrXX+6GL/b3GAgyTH966pzrZ70/fRjwAtZksSQ==",
+      "version": "4.4.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.4.3.tgz",
+      "integrity": "sha512-4xfscpisVgqqDfPaJo5vkd+Qd/ItkoagnHpufr+i2QCHBsNYp+G7UAoyFl8aPtx879u38wPV65rZ8qbGZijalA==",
       "dev": true
     },
     "underscore": {

package.json

@@ -15,8 +15,8 @@
     "zod": "^3.8.2"
   },
   "devDependencies": {
-    "@types/node": "^16.7.13",
+    "@types/node": "^16.9.1",
     "@types/urlencode": "^1.1.2",
-    "typescript": "^4.4.2"
+    "typescript": "^4.4.3"
   }
 }

src/main.ts

-import { exit } from 'process'
+import * as os from 'os'
 
 import { API } from './api/class'
 import { require_success } from './api/types'
 import { require_env, sleep, wait_for } from './utils'
 
+function sig_handler(sig: NodeJS.Signals): never {
+    console.error(`Received ${sig}, exiting`)
+    process.exit(os.constants.signals[sig] + 128)
+}
+
+process.on('SIGINT', sig_handler)
+process.on('SIGTERM', sig_handler)
+
 async function main() {
     const zulip_url = require_env('ZULIP_URL')
 
@@ -52,5 +60,5 @@ async function main() {
 
 main().catch(reason => {
     console.error(reason.message)
-    exit(1)
+    process.exit(1)
 })