Dockerfile

# Stage 1: Build the SvelteKit frontend
FROM oven/bun:1-alpine AS frontend
WORKDIR /app/web

COPY web/package.json web/bun.lock ./
RUN bun install --frozen-lockfile

COPY web/ .
RUN bun run build

# Stage 2: Build the Spring Boot jar
FROM eclipse-temurin:21-jdk-alpine AS builder
WORKDIR /app

COPY gradlew gradlew.bat build.gradle.kts settings.gradle.kts gradle.properties ./
COPY gradle/ gradle/
RUN chmod +x gradlew

# Pre-fetch Gradle wrapper and dependencies before copying source (cache layer)
RUN ./gradlew --no-daemon dependencies 2>&1 || true

COPY src/ src/
COPY --from=frontend /app/web/build web/build

RUN ./gradlew bootJar --no-daemon -x test

# Stage 3: Production runtime
FROM azul/zulu-openjdk-alpine:21-jre
WORKDIR /app

RUN addgroup -S app && adduser -S app -G app

COPY --from=builder --chown=app:app /app/build/libs/*.jar app.jar

USER app

EXPOSE 8080 8081

VOLUME ["/app/config", "/app/db"]

ENTRYPOINT ["java", "-jar", "app.jar", "--spring.config.additional-location=optional:file:/app/config/application.yaml"]