Initial Stable Release including Documentation

.eslintrc

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+{
+    "env": {
+        "browser": true,
+        "es6": true
+    },
+    "extends": "eslint:recommended",
+    "globals": {
+        "Atomics": "readonly",
+        "SharedArrayBuffer": "readonly"
+    },
+    "parserOptions": {
+        "ecmaVersion": 2018,
+        "sourceType": "module"
+    },
+    "rules": {
+    }
+}

.prettierrc

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+{
+  "semi": true,
+  "trailingComma": "all",
+  "singleQuote": true,
+  "printWidth": 120,
+  "tabWidth": 2
+}

README.md

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-# pvpc-hourly-pricing-card
-Home Assistant Lovelace custom card to use with Spain electricity hourly pricing (PVPC) integration
+# PVPC Hourly Pricing Card
+
+Home Assistant Lovelace custom card to use with [Spain electricity hourly pricing (PVPC) integration](https://www.home-assistant.io/integrations/pvpc_hourly_pricing/).
+
+![Card Example](docs/images/card-example.jpg)
+
+> This card only works with a [previously configured Spain electricity hourly pricing (PVPC) integration](https://www.danielmartingonzalez.com/pvpc-tariff-prices-in-home-assistant/) in Home Assistant.
+
+Based on [Lovelace Weather Card with Chart](https://github.com/sgttrs/lovelace-weather-card-chart) by [Yevgeniy Prokopenko](https://github.com/sgttrs).
+
+## Features
+
+- Compatible with all rates.
+- Actual price close-up.
+- Graph with the prices of the current day.
+- Graph with the prices of the next day when you are available.
+- Minimum and maximum of the current and next day.
+- Icon indicating the current pricing period.
+
+## Installation
+
+Follow this [guide](https://www.danielmartingonzalez.com/installing-lovelace-plugins).
+
+```yaml
+resources:
+  url: /local/pvpc-hourly-pricing-card.js?v=0.0.1
+  type: module
+```
+
+## Options
+
+| Name | Type | Default | Description |
+|---|---|---|---|
+| type | string | **Required** | `custom:pvpc-hourly-pricing-card` |
+| entity_id | string | **Required** | Spain electricity hourly pricing (PVPC) entity |
+| title | string | Optional | Title of the card |
+
+## Example
+
+```yaml
+cards:
+  - type: custom:pvpc-hourly-pricing-card
+    title: "PVPC 2.0 DHA"
+    entity_id: sensor.pvpc_2_0_dha
+```