Add docker-images: one Spring Boot 4 service packaged nine ways

Companion code for "Dockerizing Spring Boot 4: Layered Jars, Buildpacks, Distroless and Image Size Benchmarks". Fat jar on JDK and JRE, layered jar on Debian, Alpine and distroless, jlink, the JDK 25 AOT cache, Paketo buildpacks and Jib, each measured for size on disk and pushed, rebuild delta, startup, user and shell. Also PID 1 and signal handling, the jdeps module gap, AOT cache mismatches and buildpacks memory calculation. Transcripts in docs/output/, regenerated by scripts/run-all.sh. Co-Authored-By: Claude Opus 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01C3TETMrqVUWeFkNtz3Jbo3
2026-09-11 17:11:46 +00:00
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+# ca-certificates binding
+
+Used only with `-Pcorporate-proxy`. Put your proxy's CA certificate here as a `.pem` file next to
+`type`; the Paketo CA Certificates buildpack adds it to the build container's trust store so the
+Java buildpack can download its JRE through a TLS-intercepting proxy.
+
+`*.pem` files in this directory are git-ignored on purpose - a CA certificate from one network does
+not belong in a repository. See [docs/04-buildpacks.md](../../docs/04-buildpacks.md).
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+ca-certificates