Added medium images to result data

Added json files to gitignore
Updated documentation

.gitignore

@@ -1 +1,2 @@
 .env
+*.json

README.md

@@ -2,10 +2,35 @@
 
 This repository contains scripts to search for Magic: The Gathering cards by image contents.
 
-## generate-card-captions.js
+#### generate-card-captions.js
 
 This script takes a JSON file from scryfall.com containing card data. It generates a JSON file containing card names, IDs, and captions for each card. The captions are generated using Azure Cognitive Services Computer Vision API.
 
-## search-cards.js
+#### search-cards.js
 
 This script takes the output of generate-card-captions.js and searches the card captions for keywords provided and outputs another JSON file containing the results.
+
+## Requirements
+
+- Node.js
+- Azure Cognitive Services Computer Vision API key and endpoint
+
+## Usage
+
+1. Clone the repository.
+2. Run `npm install` to install dependencies.
+3. Obtain card data as JSON from [scryfall](https://scryfall.com/docs/api/bulk-data). Data should be an array of card objects as defined by the [scryfall API docs](https://scryfall.com/docs/api/cards)
+4. Create a `.env` file in the root directory with the following contents:
+
+```
+AZURE_VISION_RESOURCE_URL=https://<your-resource-url>.cognitiveservices.azure.com/
+AZURE_VISION_SUBSCRIPTION_KEY=<your-subscription-key>
+```
+
+5. Run `node generate-card-captions.js -i <path_to_scryfall_data.json>` to generate card captions.
+
+   1. Add `-o <output_file.json>` to specify an output file.
+   2. Add `-a <api_version>` to specify the Azure Cognitive Services API version.
+   3. Add `-m <model_version>` to specify the Azure Cognitive Services model version.
+
+6. If you want to search generated captions, currently you must modify `search-cards.js` to include the keywords you want to search for. Then run `node search-cards.js` to search the captions. Maybe I'll add command line arguments for this in the future, idk. Alternatively, check out the [MTG Visual Search Web App](http://nuc2:3000/henry/mtg-visual-search) for a clean interface to search for cards.

generate-card-captions.js

@@ -43,6 +43,8 @@ let simpleCardArray = largeImages.map((card) => {
     id: card.id,
     oracleId: card.oracle_id,
     url: card.scryfall_uri,
+    mediumImageUrl:
+      card.image_uris.normal || card.image_uris.small || card.image_uris.large,
     caption: null,
   }
 })