Add CHANGELOG for v1.13.1

CHANGELOG.md

@@ -1,5 +1,44 @@
 This is the Changelog for Judge0 CE. The Changelog for Judge0 Extra CE can be found [here](https://github.com/judge0/judge0/blob/extra/CHANGELOG.md). Learn more about their difference [here](https://github.com/judge0/judge0#flavors).
 
+# v1.13.1 (2024-04-18)
+Security researcher [Daniel Cooper](https://www.linkedin.com/in/daniel-cooper4) (@stacksparrow4) found three critical vulnerabilities in Judge0 versions `<= 1.13.0`, which this release fixes. Thank you, Daniel, for your contribution.
+
+## Deployment Procedure
+Judge0 is collecting telemetry data to help improve the product and understand its use in various production environments. Read more about telemetry [here](https://github.com/judge0/judge0/blob/v1.13.1/TELEMETRY.md).
+
+#### System Requirements
+Please note that Judge0 has only been tested on **Linux** and might not work on other systems; thus, we do not provide support for it.
+
+We recommend using Ubuntu 22.04, on which you need to do the following update of GRUB:
+1. Use `sudo` to open file `/etc/default/grub`
+2. Add `systemd.unified_cgroup_hierarchy=0` in the value of `GRUB_CMDLINE_LINUX` variable.
+4. Apply the changes: `sudo update-grub`
+5. Restart your server: `sudo reboot`
+
+Additionally, make sure you have [Docker](https://docs.docker.com) and [Docker Compose](https://docs.docker.com/compose) installed.
+
+#### Deployment Steps
+1. Download and extract the release archive:
+```
+wget https://github.com/judge0/judge0/releases/download/v1.13.1/judge0-v1.13.1.zip
+unzip judge0-v1.13.1.zip
+```
+
+2. Visit [this website](https://www.random.org/passwords/?num=1&len=32&format=plain&rnd=new) to generate a random password.
+3. Use the generated password to update the variable `REDIS_PASSWORD` in the `judge0.conf` file.
+4. Visit again [this website](https://www.random.org/passwords/?num=1&len=32&format=plain&rnd=new) to generate another random password.
+5. Use the generated password to update the variable `POSTGRES_PASSWORD` in the `judge0.conf` file.
+6. Run all services and wait a few seconds until everything is initialized:
+```
+cd judge0-v1.13.1
+docker-compose up -d db redis
+sleep 10s
+docker-compose up -d
+sleep 5s
+```
+7. Your instance of Judge0 CE v1.13.1 is now up and running; visit docs at `http://<IP ADDRESS OF YOUR SERVER>:2358/docs`.
+
+
 # v1.13.0 (2021-03-10)
 Huge thanks to [**Filtered**](https://www.filtered.ai) for sponsoring this release.