Initial commit

backend/Dockerfile

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+# --- etap 1: build ---
+FROM maven:3.9-eclipse-temurin-21 AS build
+WORKDIR /build
+
+# najpierw same zaleznosci, zeby warstwa z pobranymi artefaktami byla cache'owana
+COPY pom.xml .
+RUN mvn -B dependency:go-offline
+
+COPY src ./src
+RUN mvn -B clean package -DskipTests
+
+# --- etap 2: runtime ---
+FROM eclipse-temurin:21-jre-alpine
+WORKDIR /app
+
+# aplikacja nie dziala na roocie
+RUN addgroup -S app && adduser -S app -G app
+
+COPY --from=build /build/target/*.jar app.jar
+RUN chown app:app app.jar
+
+USER app
+EXPOSE 8080
+
+ENTRYPOINT ["java", "-jar", "/app/app.jar"]