Add readme and GH workflow

Author: binaryfire

.github/workflows/docker-image.yml

@@ -0,0 +1,20 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Build the Docker image
+      run: |
+        docker build . --file Dockerfile \
+          --tag ghcr.io/${{ github.repository }}:$(date +%s) \
+          --tag ghcr.io/${{ github.repository }}:latest

README.md

@@ -0,0 +1,81 @@
+# KV Store
+
+A lightweight, high-performance key-value store with HTTP API. Built with ReactPHP and SQLite.
+
+## Overview
+
+This project provides a simple, performant and resource-efficient key-value store that can be easily deployed alongside microservices and Docker containers. It offers a straightforward HTTP API for storing and retrieving data with minimal overhead.
+
+## Features
+
+*   RESTful HTTP API
+*   Persistent storage via SQLite
+*   Low resource usage (typical memory usage ~35MB, negligible CPU usage)
+*   Simple GET/PUT/DELETE operations
+
+## Getting Started
+
+### Running with Docker
+
+Run the container with default settings:
+
+```
+docker run -p 8080:8080 ghcr.io/binaryfire/kv:latest
+```
+
+For data persistence, map the database directory to a volume:
+
+```
+docker run -p 8080:8080 -v kv-database:/var/www/database ghcr.io/binaryfire/kv:latest
+```
+
+## API Routes
+
+| Method | Route | Description |
+| --- | --- | --- |
+| GET | / | List all keys |
+| GET | /{key} | Get value for key |
+| PUT | /{key} | Set value for key |
+| DELETE | /{key} | Delete key |
+
+## Usage Examples
+
+List all keys:
+
+```
+curl http://localhost:8080/
+```
+
+Get a specific value:
+
+```
+curl http://localhost:8080/my_key
+```
+
+Set a value (or overwrite existing value):
+
+```
+curl -X PUT -d "my value" http://localhost:8080/my_key
+```
+
+Delete a key:
+
+```
+curl -X DELETE http://localhost:8080/my_key
+```
+
+## Key Format Requirements
+
+All keys must be in lowercase \`snake\_case\` format:
+
+*   Must contain only lowercase letters and numbers
+*   Words separated by underscores
+*   Example: `user_settings`, `api_key_1`
+
+## Building from Source
+
+```
+./build.sh
+```
+
+This will create Docker images tagged with the current timestamp and 'latest'.