Fix docker

Dockerfile

@@ -1,55 +1,58 @@
-FROM openjdk:21-slim AS kotlin-build
+# Stage 1: Install Gradle (Base)
+FROM ubuntu:24.04 AS gradle-base
 
 # Install necessary tools and Gradle
 RUN apt-get update && \
     apt-get install -y wget unzip && \
     wget https://services.gradle.org/distributions/gradle-7.4.2-bin.zip -P /tmp && \
-    unzip -d /opt/gradle /tmp/gradle-7.4.2-bin.zip
+    unzip -d /opt/gradle /tmp/gradle-7.4.2-bin.zip && \
+    rm /tmp/gradle-7.4.2-bin.zip
 
 # Add Gradle to PATH
 ENV PATH=/opt/gradle/gradle-7.4.2/bin:$PATH
 
+# Stage 2: Kotlin Build
+FROM openjdk:21-slim AS kotlin-build
+
+# Copy Gradle installation from base stage
+COPY --from=gradle-base /opt/gradle /opt/gradle
+ENV PATH=/opt/gradle/gradle-7.4.2/bin:$PATH
+
 # Set up Kotlin app build environment
 WORKDIR /app
 
-# Explicitly copy gradlew and gradle directory (in case copy context is problematic)
+# Copy necessary build files and app sources
 COPY gradlew /app/gradlew
 COPY gradle /app/gradle
 COPY . /app
 
-# Ensure gradlew is present and executable
-RUN ls -l /app/gradlew && chmod +x /app/gradlew
-
-# Build Kotlin app
-RUN ./gradlew build
+# Ensure gradlew is executable and build the Kotlin app
+RUN chmod +x ./gradlew && ./gradlew build
 
-# Stage 2: Swift Build
+# Stage 3: Swift Build
 FROM swift:6.0 AS swift-build
 
-# Install necessary tools and Gradle
-RUN apt-get update && \
-    apt-get install -y wget unzip && \
-    wget https://services.gradle.org/distributions/gradle-7.4.2-bin.zip -P /tmp && \
-    unzip -d /opt/gradle /tmp/gradle-7.4.2-bin.zip
-
-# Add Gradle to PATH
+# Copy Gradle installation from base stage
+COPY --from=gradle-base /opt/gradle /opt/gradle
 ENV PATH=/opt/gradle/gradle-7.4.2/bin:$PATH
 
 # Set up Swift app build environment
 WORKDIR /app
+
+# Copy app sources for Swift
 COPY . /app
 
-# Build Swift app
+# Build the Swift app
 RUN ./gradlew build
 
-# Final Stage: Combine Artifacts
+# Stage 4: Combine Artifacts
 FROM ubuntu:24.04 AS final
 
 # Copy Kotlin build artifacts
-COPY --from=kotlin-build /app /final/kotlin
+COPY --from=kotlin-build /app/build /final/kotlin
 
 # Copy Swift build artifacts
-COPY --from=swift-build /app /final/swift
+COPY --from=swift-build /app/build /final/swift
 
 # Set the working directory and default command
 WORKDIR /final