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Adrien d8bcdce879 Squashed commit of the following:

commit 0d624137c2557c6eeb87020749e4977b821c2b5c
Author: Adrien <adrien.cesaro@proton.me>
Date:   Thu Apr 9 11:55:22 2026 +0200

    backend native image setup

2026-04-09 12:05:02 +02:00

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Build Contract: Native Image

Branch: 005-native-image-deployment | Date: 2026-04-07

Overview

This contract defines what the native build produces and how consumers (developers, CI, docker-compose) interact with it. The REST API contract is unchanged — all existing endpoints remain identical.

Build Inputs

Input	Required	Description
GraalVM JDK 25	Yes (native profile only)	`JAVA_HOME` must point to GraalVM 25
`DOCKER_HOST` / Docker daemon	Optional	Required for `jib:dockerBuild`; not needed for `jib:build`
`jib.to.image` Maven property	Optional	Override target image name; defaults to `ai-teacher-backend`

Build Outputs

Profile	Command	Output
Default (JVM)	`mvn package`	`target/ai-teacher-backend-*.jar`
Native	`mvn -Pnative package`	`target/ai-teacher-backend` (native executable)
Native + Docker	`mvn -Pnative package jib:dockerBuild`	Local Docker image `ai-teacher-backend:latest`
Native + Registry	`mvn -Pnative package jib:build`	Remote Docker image (configured via properties)

Docker Image Contract

Property	Value
Base image	`gcr.io/distroless/base-nossl-debian12`
Entrypoint	`/app/ai-teacher-backend` (native executable)
Exposed port	`8080`
Architecture	`linux/amd64` (matches build host)
Required env vars	Same as JVM mode (`SPRING_DATASOURCE_URL`, `OPENAI_API_KEY`, etc.)

REST API Contract

Unchanged — the native image exposes the same HTTP API as the JVM image:

GET /api/v1/books
POST /api/v1/books (multipart PDF upload)
DELETE /api/v1/books/{id}
POST /api/v1/chat
GET /api/v1/chat/history

All endpoints use the same request/response schemas.

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