Update Dockerfile

Dockerfile

@@ -1,8 +1,13 @@
 # Use the latest Ubuntu image as the base
 FROM ubuntu:latest
 
-# Update the package lists and install PostgreSQL
-RUN apt-get update && apt-get install -y postgresql-13 postgresql-client-13
+# Add the PostgreSQL repository
+RUN apt-get install -y gnupg
+RUN sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
+RUN wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -
+
+# Install PostgreSQL 16 client
+RUN apt-get update && apt-get install -y postgresql-client-16
 
 # Copy the entrypoint script to the container
 COPY entrypoint.sh /usr/local/bin/