Add install instructions

Author: Sopamo

Readme.md

@@ -18,6 +18,25 @@ If you have a usecase that's not listed above, please create an [issue](https://
  - **Super simple API** - No machine learning knowledge required
  - **Maximum performance** - Preloads the machine learning core, so predictions are super fast
 
+### Installation
+Install the package via composer:
+
+    composer require funcai/funcai-php
+
+Until we've figured out a solution for how to host the final models, the following step is a bit more difficult than we'd like it to be.
+
+You'll need to have python installed (locally), and some sort of way to host the model files yourself.
+
+To generate the model, run:
+
+    pip3 install tensorflow
+    python3 scripts/generate/efficientnet.py
+
+The model will be placed in /models/efficientnet. You will need to have access to this folder from your webserver. For example, if you've uploaded the folder to /var/www/models/efficientnet, you should set the path like this:
+
+    \FuncAI\Config::setModelBasePath('/var/www/models');
+
+
 ### Requirements
  - Either the provided dockerfile
  - Or PHP >= 7.4 on Linux

example.php

@@ -4,6 +4,8 @@
 
 require __DIR__.'/vendor/autoload.php';
 
+\FuncAI\Config::setModelBasePath(realpath(dirname(__FILE__) . '/models/'));
+
 $model = new EfficientNet();
 $output = $model->predict(__DIR__ . '/sample_data/butterfly.jpg');
 

src/Config.php

@@ -0,0 +1,26 @@
+<?php
+namespace FuncAI;
+
+class Config {
+    private static string $modelBasePath;
+
+    /**
+     * @return string
+     */
+    public static function getModelBasePath(): string
+    {
+        if(!isset(self::$modelBasePath)) {
+            self::$modelBasePath = realpath(dirname(__FILE__) . '/../models/');
+        }
+        return self::$modelBasePath;
+    }
+
+    /**
+     * @param string $modelBasePath
+     */
+    public static function setModelBasePath(string $modelBasePath): void
+    {
+        self::$modelBasePath = $modelBasePath;
+    }
+
+}

src/Models/EfficientNet.php

@@ -1,13 +1,14 @@
 <?php
 namespace FuncAI\Models;
 
+use FuncAI\Config;
 use FuncAI\Tensorflow\TensorFlow;
 
 class EfficientNet extends AbstractModel
 {
     public function getModelPath()
     {
-        return __DIR__ . '/../../models/efficientnet';
+        return Config::getModelBasePath() . '/efficientnet';
     }
 
     public function getOutputTensor()