Update Dockerfile

Dockerfile

@@ -1,7 +1,17 @@
 FROM postgres:latest
 
+# Set environment variables for PostgreSQL
 ENV POSTGRES_USER=postgres
 ENV POSTGRES_PASSWORD=password
 ENV POSTGRES_DB=mydatabase
 
+# Create a new directory for PostgreSQL data and set permissions
+RUN mkdir -p /var/lib/postgresql/data && \
+    chown -R postgres:postgres /var/lib/postgresql/data && \
+    chmod 700 /var/lib/postgresql/data
+
+# Expose PostgreSQL port
 EXPOSE 5432
+
+# Start PostgreSQL server
+CMD ["postgres"]