fix: update Dockerfile, application properties, and controller mappings for health check and CORS support

backend/Dockerfile

@@ -1,15 +1,21 @@
-# Build stage
+# Build stage ---------------------------------------------------------------
 FROM maven:3.9.12-eclipse-temurin-25 AS build
 WORKDIR /app
 COPY pom.xml .
 COPY src ./src
 RUN mvn clean package
 
-# Run stage
+# Run stage ---------------------------------------------------------------
 FROM eclipse-temurin:25-jre
 WORKDIR /app
 ARG APP_VERSION=dev
 ENV APP_VERSION=${APP_VERSION}
+
+# Install curl (required for the health‑check)
+RUN apt-get update && \
+    apt-get install -y curl && \
+    rm -rf /var/lib/apt/lists/*
+
 COPY --from=build /app/target/*.jar app.jar
-EXPOSE 8080
+EXPOSE 8082
 ENTRYPOINT ["java", "-jar", "app.jar"]