fix: missing .dockerignore

docker/Dockerfile

@@ -1,5 +1,5 @@
 # Stage 1: Cache Gradle dependencies
-FROM gradle:latest AS cache
+FROM gradle:9.6.1-jdk21-alpine AS cache
 RUN mkdir -p /home/gradle/cache_home
 ENV GRADLE_USER_HOME=/home/gradle/cache_home
 COPY build.gradle.* gradle.properties /home/gradle/app/
@@ -7,7 +7,7 @@ WORKDIR /home/gradle/app
 RUN gradle build -i -x check
 
 # Stage 2: Build Application
-FROM gradle:latest AS build
+FROM gradle:9.6.1-jdk21-alpine AS build
 COPY --from=cache /home/gradle/cache_home /home/gradle/.gradle
 COPY --chown=gradle:gradle . /home/gradle/src
 WORKDIR /home/gradle/src
@@ -16,8 +16,8 @@ WORKDIR /home/gradle/src
 RUN gradle buildFatJar --no-daemon
 
 # Stage 3: Create the Runtime Image
-FROM amazoncorretto:21 AS runtime
+FROM eclipse-temurin:21-jre-alpine AS runtime
 EXPOSE 8080
 RUN mkdir /app
-COPY --from=build /home/gradle/src/build/libs/*.jar /app/event-demo-all.jar
+COPY --from=build /home/gradle/src/build/libs/*-all.jar /app/event-demo-all.jar
 ENTRYPOINT ["java","-jar","/app/event-demo-all.jar"]