Add Go implementation: main.go, Dockerfile, docker-compose.yml

docker-compose.yml

@@ -0,0 +1,26 @@
+services:
+  gitea-custom-api:
+    build: .
+    container_name: gitea-custom-api
+    restart: unless-stopped
+    environment:
+      DB_HOST: mysql
+      DB_USER: root
+      DB_PASS: ${MYSQL_ROOT_PASSWORD}
+      DB_NAME: giteadb
+      API_KEY_FILE: /data/api-key
+      WEBHOOK_SECRET: ${GITEA_WEBHOOK_SECRET}
+      PORT: "8080"
+    volumes:
+      - ./api-key:/data/api-key
+    networks:
+      - git-network
+    healthcheck:
+      test: ["CMD", "wget", "-qO-", "http://localhost:8080/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+networks:
+  git-network:
+    external: true