gradle

Use it as a base image

Reference it in the FROM line of your Dockerfile. Nonroot, read-only root filesystem, built for amd64 and arm64.

FROM ghcr.io/quenchworks/images/gradle:9

Or pull it directly

docker pull ghcr.io/quenchworks/images/gradle:9

Version line

9

Latest line

9

Architectures

amd64, arm64

Runs as

nonroot (uid 1001)

Root filesystem

read-only

License

Apache-2.0

Verify the supply chain

This image is cosign-signed and carries an SPDX SBOM and a SLSA build-provenance attestation on the same digest. Check all three before you build on it:

# 1. signature — built and signed by QuenchWorks CI
cosign verify ghcr.io/quenchworks/images/gradle:9 \
  --certificate-identity-regexp 'https://github.com/quenchworks/.+' \
  --certificate-oidc-issuer https://token.actions.githubusercontent.com

# 2. SLSA build provenance — which workflow built it, from what
gh attestation verify oci://ghcr.io/quenchworks/images/gradle:9 --owner quenchworks

# 3. SPDX SBOM — the package inventory
gh attestation verify oci://ghcr.io/quenchworks/images/gradle:9 --owner quenchworks \
  --predicate-type https://spdx.dev/Document

See the SBOM & provenance guide for reading the SBOM and using these checks in CI.

Best-practice Dockerfile for 9

Build the jar with the gradle image (Gradle user home under /tmp for the read-only rootfs), then run it on the slim jre base. The daemon is disabled so the build is reproducible.

1
# Build stage: build the jar with Gradle.
2
FROM ghcr.io/quenchworks/images/gradle:9 AS build
3
USER root
4
WORKDIR /app
5
ENV GRADLE_USER_HOME=/tmp/gradle
6

7
COPY build.gradle.kts settings.gradle.kts ./
8
RUN ["gradle", "--no-daemon", "dependencies"]
9
COPY src ./src
10
RUN ["gradle", "--no-daemon", "-x", "test", "bootJar"]
11

12
# Runtime stage: run the jar on the slim JRE base, nonroot.
13
FROM ghcr.io/quenchworks/images/jre:21 AS runtime
14
WORKDIR /app
15
COPY --from=build /app/build/libs/*.jar /app/app.jar
16
USER 1001
17
EXPOSE 8080
18
ENTRYPOINT ["java", "-Djava.io.tmpdir=/tmp", "-jar", "/app/app.jar"]

This Dockerfile is pinned to the 9 line. For the line-by-line walkthrough and ecosystem variants (npm/Yarn, pip/uv/Poetry, Maven/Gradle), see the Build a Java app guide.