⬆️ Update docker image version

Dockerfile

@@ -1,15 +1,17 @@
+ARG image=node:21-alpine3.18
 # First image to compile typescript to javascript
-FROM node:20-alpine3.18 AS build-image
+FROM ${image} AS build-image
 WORKDIR /app
 COPY . .
 RUN npm ci
 RUN npm run clean
 RUN npm run build
 
 # Second image, that creates an image for production
-FROM node:20-alpine3.18 AS prod-image
+FROM ${image} AS prod-image
 WORKDIR /app
 COPY --from=build-image ./app/dist ./dist
 COPY package* ./
 RUN npm ci --production
-CMD [ "node", "./dist/src/index.js" ]
+CMD [ "node", "./dist/src/index.js" ]
+