Add README

api/README.md

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+<p align="center">
+    <a href="" rel="nooperner">
+    <img width=200px height=200px src="logo.png" alt="Tailfin Logo"></a>
+</p>
+
+<h3 align="center">Tailfin</h3>
+
+---
+
+<p align="center">A self-hosted digital flight logbook</p>
+
+## Table of Contents
+
++ [About](#about)
++ [Getting Started](#getting_started)
++ [Configuration](#configuration)
++ [Usage](#usage)
+
+## About <a name="about"></a>
+
+Tailfin is a digital flight logbook designed to be hosted on a personal server, computer, or cloud solution. This is the
+API segment and can be run independently. It is meant to be a base for future applications, both web and mobile.
+
+I created this because I was disappointed with the options available for digital logbooks. The one provided by
+ForeFlight is likely most commonly used, but my proclivity towards self-hosting drove me to seek out another solution.
+Since I could not find any ready-made self-hosted logbooks, I decided to make my own.
+
+## Getting Started <a name="getting_started"></a>
+
+### Prerequisites
+
+- python 3.11+
+- mongodb 7.0.4
+
+### Installation
+
+1. Clone the repo
+
+```
+$ git clone https://git.github.com/azpsen/tailfin-api.git
+$ cd tailfin-api
+```
+
+2. (Optional) Create and activate virtual environment
+
+```
+$ python -m venv tailfin-env
+$ source tailfin-env/bin/activate
+```
+
+3. Install python requirements
+
+```
+$ pip install -r requirements.txt
+```
+
+4. Configure the database connection
+
+The default configuration assumes a running instance of MongoDB on `localhost:27017`, secured with username and
+password `tailfin-api` and `tailfin-api-password`. This can (and should!) be changed by
+modifying `.env`, as detailed in [Configuration](#configuration). Note that the MongoDB instance must be set up with
+proper authentication before starting the server. I hope to eventually release a docker image that will simplify this
+whole process.
+
+5. Start the server
+
+```
+$ python app.py
+```
+
+## Configuration <a name="configuration"></a>
+
+To configure Tailfin, modify the `.env` file. Some of these options should be changed before running the server. All
+available options are detailed below:
+
+```
+DB_URI: Address of MongoDB instance. Default: localhost
+DB_PORT: Port of MongoDB instance. Default: 27017
+DB_NAME: Name of the database to be used by Tailfin. Default: tailfin
+
+DB_USER: Username for MongoDB authentication. Default: tailfin-api
+DB_PWD: Password for MongoDB authentication. Default: tailfin-api-password
+
+REFRESH_TOKEN_EXPIRE_MINUTES: Duration in minutes to keep refresh token active before invalidating it. Default: 10080 (7 days)
+ACCESS_TOKEN_EXPIRE_MINUTES: Duration in minutes to keep access token active before invalidating it. Default: 30
+
+JWT_ALGORITHM: Encryption algorithm to use for access and refresh tokens. Default: HS256
+JWT_SECRET_KEY: Secret key used to encrypt and decrypt access tokens. Default: please-change-me
+JWT_REFRESH_SECRET_KEY: Secret key used to encrypt and decrypt refresh tokens. Default: change-me-i-beg-of-you
+
+TAILFIN_ADMIN_USERNAME: Username of the default admin user that is created on startup if no admin users exist. Default: admin
+TAILFIN_ADMIN_PASSWORD: Password of the default admin user that is created on startup if no admin users exist. Default: change-me-now
+
+TAILFIN_PORT: Port to run the local Tailfin API server on. Default: 8081
+```
+
+## Usage <a name="usage"></a>
+
+Once the server is running, full API documentation is available at `localhost:8081/docs`