Add blogpost for FerretDB v1.13.0 (FerretDB#3639)

website/blog/2023-10-24-ferretdb-v1130-new-postgresql-backend.md

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+---
+slug: ferretdb-v1130-new-postgresql-backend
+title: FerretDB releases v1.13.0 with new PostgreSQL backend
+authors: [alex]
+description: >
+  The release of FerretDB v1.13.0 brings new changes, which include the new PostgreSQL backend – now enabled by default – `arm/v7` packages, and a default SQLite directory for Docker images.
+image: /img/blog/ferretdb-v1.13.0.png
+tags: [release]
+---
+
+![FerretDB v.1.13.0 - new release with new PostgreSQL backend](/img/blog/ferretdb-v1.13.0.png)
+
+The release of FerretDB v1.13.0 brings new changes, which include the new PostgreSQL backend – now enabled by default – `arm/v7` packages, and a default SQLite directory for Docker images.
+
+<!--truncate-->
+
+Let's see what's changed.
+
+## New PostgreSQL Backend
+
+In the past couple of months, we've been working on the new PostgreSQL backend, and we're thrilled to finally make it available by default.
+Nevertheless, if you still want to enable the old backend, you can do so with the `--postgresql-old` flag or `FERRETDB_POSTGRESQL_OLD=true` environment variable.
+Please note however that this will be removed in the next release.
+
+## Default SQLite directory for Docker images and `arm/v7` packages now available
+
+The new release includes changes to the default SQLite directory for Docker images.
+Our Docker images now use `/state` directory for the SQLite backend.
+That directory is also a Docker volume, so data will be preserved after the container restart by default.
+
+Please note that this change does not affect binaries and `.deb`/`.rpm` packages.
+
+In addition, the new version of FerretDB now offers `linux/arm/v7` binaries, Docker images, and `.deb`/`.rpm` packages.
+[See them here](https://github.com/FerretDB/FerretDB/releases/).
+
+## Other changes
+
+There were a lot of exciting changes in this release, and while we've not touched on everything in this blog post, you can [find the rest of the changes here](https://github.com/FerretDB/FerretDB/releases/tag/v1.13.0).
+
+In our ongoing efforts to enhance FerretDB performance, this release introduces additional pushdowns for the PostgreSQL backend.
+We've also added a filter pushdown for `_id: <string>` for the SQLite backend.
+See here to [learn about pushdowns on FerretDB](https://blog.ferretdb.io/ferretdb-v-0-9-3-improved-aggregation-pipeline-support/).
+
+Additionally, we've resolved the bug caused by invalid validation for the `_id` field, where attempting to insert a document such as this `db.test.insertOne({_id: 1, v:{_id: ["foo", "bar"]}})` returns an error that the "`_id` value cannot be of type array".
+
+This release also includes some of the missing fields for `collStats`, `dbStats`, and `aggregate` `$collStats`, along with basic logging for the PostgreSQL backend.
+
+## An eventful season for open source!
+
+As we wind down the Hacktoberfest season, it's been an incredible period for the open-source community as many new entrants made their first contribution to an open-source project.
+At FerretDB, we've seen a remarkable uptick in contributors, with many contributing for the first time.
+In this new release, we had 5 new contributors: [@Akhil-2001](https://github.com/Akhil-2001), [@sid-js](https://github.com/sid-js), [@codenoid](https://github.com/codenoid), [@chanon-mike](https://github.com/chanon-mike), and [@pvinoda](https://github.com/pvinoda).
+We appreciate all the contributions, bug reports, and feedback from everyone.
+
+Please know you are always welcome to contribute to FerretDB _any time_, and we can't wait to welcome more open-source enthusiasts in the coming weeks and months.
+If you don't know what to start with, [reach out to us on any of our community channels](https://docs.ferretdb.io/#community) and we'll be happy to help you get started.