Added GitHub webhook functionality and configuration for API interaction

This commit introduces functionality for GitHub webhook interaction and API calls. The git operations are handled by a custom GitHub client in PHP, details for API endpoints are outlined in a new OpenAPI schema, and the project setup includes PHP FPM and NGINX configuration using Docker. A webhook receiver is also added to process incoming webhook payloads.

docker-compose.yml

@@ -0,0 +1,29 @@
+version: '3.8'
+
+services:
+  php-fpm:
+    build:
+      context: ./php-fpm
+    volumes:
+      - ./src:/var/www/html
+    networks:
+      - nginx-proxy
+    restart: always
+
+  nginx:
+    image: nginx:latest
+    environment:
+      - VIRTUAL_HOST=${VIRTUAL_HOST}
+      - VIRTUAL_PORT=${VIRTUAL_PORT}
+    volumes:
+      - ./src:/var/www/html
+      - ./nginx/nginx.conf:/etc/nginx/conf.d/default.conf
+    depends_on:
+      - php-fpm
+    networks:
+      - nginx-proxy
+    restart: always
+
+networks:
+  nginx-proxy:
+    external: true