chore: Improve docker build caching

Dockerfile

@@ -2,7 +2,7 @@
 # https://github.com/vercel/next.js/blob/canary/examples/with-docker/Dockerfile
 
 # Install dependencies only when needed
-FROM node:20-alpine AS deps
+FROM node:20-alpine AS ndeps
 # Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
 RUN apk add --no-cache libc6-compat
 WORKDIR /app
@@ -11,16 +11,24 @@ WORKDIR /app
 COPY package.json pnpm-lock.yaml* ./
 RUN yarn global add pnpm && pnpm i
 
+FROM gradle:8.1.1-jdk11 AS kdeps
+WORKDIR /app
+COPY kotlin/gradle/wrapper/gradle-wrapper.properties kotlin/build.gradle.kts kotlin/gradle.properties kotlin/settings.gradle.kts kotlin/gradlew kotlin/gradlew.bat kotlin/kotlin-js-store ./kotlin/
+WORKDIR /app/kotlin
+RUN gradle wrap && chmod +x gradlew && ./gradlew assemble
+
 
 # Rebuild the source code only when needed
 FROM node:20-bullseye-slim AS builder
 WORKDIR /app
-COPY --from=deps /app/node_modules ./node_modules
-COPY . .
 
 # Install java11
 RUN apt -q update && apt -y -q install --no-install-recommends openjdk-11-jdk-headless
 
+COPY --from=ndeps /app/node_modules ./node_modules
+COPY --from=kdeps /app/kotlin/build /app/kotlin/.gradle ./kotlin/
+COPY . .
+
 # Next.js collects completely anonymous telemetry data about general usage.
 # Learn more here: https://nextjs.org/telemetry
 # Uncomment the following line in case you want to disable telemetry during the build.