Use latest PostgreSQL by default

Author: hashworks

docs/citus/Dockerfile.app

@@ -1,6 +1,6 @@
 FROM debian:bookworm-slim
 
-ARG PGVERSION=14
+ARG PGVERSION=17
 
 RUN apt-get update \
   && apt-get install -y --no-install-recommends \

docs/tutorial/Dockerfile.app

@@ -1,6 +1,6 @@
 FROM debian:bookworm-slim
 
-ARG PGVERSION=14
+ARG PGVERSION=17
 
 RUN apt-get update \
   && apt-get install -y --no-install-recommends \

src/bin/pg_autoctl/cli_do_tmux_compose.c

@@ -364,13 +364,13 @@ tmux_compose_docker_build(TmuxOptions *options)
 		if (!get_env_copy("PGVERSION", pgversion, sizeof(pgversion)))
 		{
 			/* errors have already been logged */
-			log_warn("Using PGVERSION=14");
-			strlcpy(pgversion, "14", sizeof(pgversion));
+			log_warn("Using PGVERSION=17");
+			strlcpy(pgversion, "17", sizeof(pgversion));
 		}
 	}
 	else
 	{
-		strlcpy(pgversion, "14", sizeof(pgversion));
+		strlcpy(pgversion, "17", sizeof(pgversion));
 	}
 
 	/* prepare our --build-arg PGVERSION=XX */