Update Dockerfile

Dockerfile

@@ -1,18 +1,29 @@
 FROM debian:stable
 
-USER root
-
 ENV DEBIAN_FRONTEND=noninteractive
 
-COPY . /app
-
-RUN chmod -R 777 /app
+# Install dependencies
+RUN apt-get update && \
+    apt-get install -y wget gnupg && \
+    rm -rf /var/lib/apt/lists/*
 
-WORKDIR /app
+# Add Amazon Corretto GPG key and repository
+RUN wget -O- https://apt.corretto.aws/corretto.key | gpg --dearmor > /usr/share/keyrings/corretto-archive-keyring.gpg && \
+    echo "deb [signed-by=/usr/share/keyrings/corretto-archive-keyring.gpg] https://apt.corretto.aws stable main" > /etc/apt/sources.list.d/corretto.list
 
+# Install OpenJDK 21
 RUN apt-get update && \
-    apt-get install -y openjdk-21-jdk && \
-    apt-get clean && \
+    apt-get install -y java-21-amazon-corretto-jdk && \
     rm -rf /var/lib/apt/lists/*
 
+# Set working directory
+WORKDIR /app
+
+# Copy application files
+COPY . /app
+
+# Set permissions
+RUN chmod -R 777 /app
+
+# Set default command
 CMD ["sh", "start.sh"]