install correct pg_dump version

Dockerfile

@@ -1,9 +1,18 @@
-FROM alpine
+FROM ubuntu:jammy
 
-RUN apk update && apk add postgresql-client bash ncurses
+# Add the PostgreSQL Apt Repository for PostgreSQL packages
+RUN apt-get update && \
+    apt-get install -y gnupg wget && \
+    wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - && \
+    echo "deb http://apt.postgresql.org/pub/repos/apt/ $(grep UBUNTU_CODENAME /etc/os-release | cut -d= -f2)-pgdg main" > /etc/apt/sources.list.d/pgdg.list
 
-WORKDIR app
+# Install postgresql-client-16
+RUN apt-get update && \
+    apt-get install -y postgresql-client-16 bash ncurses-bin && \
+    rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
 
 ADD . .
 
-CMD bash migrate.sh
+CMD ["bash", "migrate.sh"]