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devops(backend): switch to multi-stage Docker build #238

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marcel merged 4 commits from devops/multi-stage-docker-build into main 2026-04-15 11:33:04 +02:00
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1 changed files with 5 additions and 3 deletions
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backend/Dockerfile
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@@ -1,4 +1,4 @@
FROM eclipse-temurin:21-jdk AS builder FROM eclipse-temurin:21.0.10_7-jdk-noble AS builder
WORKDIR /app WORKDIR /app
# Copy wrapper and POM first — dependency layer is cached separately from source # Copy wrapper and POM first — dependency layer is cached separately from source
@@ -7,10 +7,12 @@ COPY mvnw pom.xml ./
RUN --mount=type=cache,target=/root/.m2 ./mvnw dependency:go-offline -q RUN --mount=type=cache,target=/root/.m2 ./mvnw dependency:go-offline -q
COPY src ./src COPY src ./src
RUN --mount=type=cache,target=/root/.m2 ./mvnw clean package -DskipTests -q # -Dmaven.test.skip=true skips test compilation entirely (not just execution)
RUN --mount=type=cache,target=/root/.m2 ./mvnw clean package -Dmaven.test.skip=true -q
FROM eclipse-temurin:21-jre FROM eclipse-temurin:21.0.10_7-jre-noble
WORKDIR /app WORKDIR /app
# Spring Boot repackages to *.jar; pre-repackage artifact uses .jar.original, not .jar
COPY --from=builder /app/target/*.jar app.jar COPY --from=builder /app/target/*.jar app.jar
EXPOSE 8080 EXPOSE 8080
CMD ["java", "-jar", "app.jar"] CMD ["java", "-jar", "app.jar"]