chore: update Postgres docker to v18

Author: riipandi

apps/go-modular/pkg/testutils/testcontainer.go

@@ -47,7 +47,7 @@ func (te *TestEnv) SetupPostgres() (*pgxpool.Pool, string, error) {
 	var err error
 	te.postgresC, err = testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{
 		ContainerRequest: testcontainers.ContainerRequest{
-			Image:        "postgres:18rc1-alpine",
+			Image:        "postgres:18-alpine",
 			ExposedPorts: []string{"5432/tcp"},
 			Env: map[string]string{
 				"POSTGRES_PASSWORD": "testpass",

docker/_stacks_/postgres.yaml

@@ -2,8 +2,7 @@
 
 services:
   pgsql:
-    # image: pgduckdb/pgduckdb:${PGSQL_VERSION:-17-main}
-    image: postgres:${PGSQL_VERSION:-18beta3-alpine}
+    image: postgres:${PGSQL_VERSION:-18-alpine}
     hostname: postgres
     restart: unless-stopped
     ports: ['5432:5432']