# ─────────────────────────────────────────────────────────────
# Sandbox Dockerfile — Java execution
# ─────────────────────────────────────────────────────────────

FROM eclipse-temurin:21-jdk-alpine

# Create sandbox user
RUN adduser -D -u 1000 sandbox

# Create workspace
RUN mkdir -p /sandbox && chown sandbox:sandbox /sandbox

USER sandbox
WORKDIR /sandbox

ENTRYPOINT ["sh", "-c"]