chore: clean up repo for public release (#538)

Author: joaodiaslobo

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+Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, caste, color, religion, or sexual
+identity and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the overall
+  community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or advances of
+  any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email address,
+  without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+[email protected].
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series of
+actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or permanent
+ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior, harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within the
+community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.1, available at
+[https://www.contributor-covenant.org/version/2/1/code_of_conduct.html][v2.1].
+
+Community Impact Guidelines were inspired by
+[Mozilla's code of conduct enforcement ladder][Mozilla CoC].
+
+For answers to common questions about this code of conduct, see the FAQ at
+[https://www.contributor-covenant.org/faq][FAQ]. Translations are available at
+[https://www.contributor-covenant.org/translations][translations].
+
+[homepage]: https://www.contributor-covenant.org
+[v2.1]: https://www.contributor-covenant.org/version/2/1/code_of_conduct.html
+[Mozilla CoC]: https://github.com/mozilla/diversity
+[FAQ]: https://www.contributor-covenant.org/faq
+[translations]: https://www.contributor-covenant.org/translations

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+[asdf-vm]: https://asdf-vm.com/
+
+# 🚀 Getting Started
+
+These instructions will get you a copy of the project up and running on your
+local machine for development and testing purposes.
+
+## 📥 Prerequisites
+
+The following software is required to be installed on your system:
+
+- [Erlang 26+](https://www.erlang.org/downloads)
+- [Elixir 1.17+](https://elixir-lang.org/install.html)
+- [PostgreSQL 13+](https://www.postgresql.org/download/)(see [this section](#-docker) for setting up with docker)
+
+We recommend using [asdf version manager][asdf-vm] to install and manage all
+the programming languages' requirements.
+
+If you prefer to use docker, see the [section below](#-docker).
+
+## 🔧 Setup
+
+First, clone the repository:
+
+```
+git clone [email protected]:cesium/safira.git
+cd safira
+```
+
+Then, run the setup script to get all dependencies configured. Make sure the database is up and running.
+
+```
+bin/setup
+```
+
+Then you should change the `.env.dev` file as needed. Run this script again if
+needed.
+
+## 🔨 Development
+
+Start the development server and then you can visit `http://localhost:4000`
+from your browser.
+
+```
+bin/server
+```
+
+Run the tests.
+
+```
+bin/test
+```
+
+Lint your code.
+
+```
+bin/lint
+```
+
+Format your code.
+
+```
+bin/format
+```
+
+## 🐳 Docker
+
+For data persistence this project uses a PostgreSQL database. You should have
+PostgreSQL up and running.
+
+If you want to setup the required database using docker containers you can
+easily do it with [docker-compose](https://docs.docker.com/compose/install/).
+
+Create and start the database containers. You should use `linux.yml` if running on Linux and `darwin.yml` if running on macOS.
+
+```
+cp .env.dev.sample .env.dev
+docker-compose -f docker-compose.dev.yml -f {linux,darwin}.yml up db
+```
+
+Start the previously created containers.
+
+```
+docker-compose -f docker-compose.dev.yml -f {linux,darwin}.yml start
+```
+
+Stop the containers.
+
+```
+docker-compose -f docker-compose.dev.yml -f {linux,darwin}.yml stop
+```
+
+Destroy the containers and volumes created.
+
+```
+docker-compose -f docker-compose.dev.yml -f {linux,darwin}.yml down -v
+```
+
+## 🔗 References
+
+You can use these resources to learn more about the technologies this project
+uses.
+
+- [Getting Started with Elixir](https://elixir-lang.org/getting-started/introduction.html)
+- [Erlang/Elixir Syntax: A Crash Course](https://elixir-lang.org/crash-course.html)
+- [Elixir School Course](https://elixirschool.com/en/)
+- [Phoenix Guides Overview](https://hexdocs.pm/phoenix/overview.html)
+- [Phoenix Documentation](https://hexdocs.pm/phoenix)
+- [Ecto Documentation](https://hexdocs.pm/ecto)

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+MIT License
+
+Copyright (c) 2025 CeSIUM - Centro de Estudantes de Eng. Informática da UMinho
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.