With a pre-built JAR, Spring Boot + Flyway starts in ~15 seconds.
The previous 60s was sized for runtime compilation (90+ seconds).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Pin to eclipse-temurin:21.0.10_7-{jdk,jre}-noble for reproducible builds
- Switch -DskipTests to -Dmaven.test.skip=true: skips test compilation entirely,
not just execution — faster and avoids build failures from test-only missing classes
- Add comment on COPY *.jar explaining why the glob is safe (Spring Boot renames
the pre-repackage artifact to .jar.original, leaving only one .jar in target/)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Prevents 111MB of compiled output from being sent to the BuildKit daemon
on cold builds. Only .mvn/, mvnw, pom.xml, and src/ are needed by the
three COPY instructions in the Dockerfile.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Replace runtime mvn spring-boot:run with a proper multi-stage build:
- Stage 1 (builder): compiles JAR with BuildKit cache mount for ~/.m2
- Stage 2 (runtime): eclipse-temurin:21-jre with only the JAR
Removes the backend source volume mount and maven_cache named volume.
Deploy with: docker compose up -d --build
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
