♻️ Change Docker instance to singleton

src/pages/api/docker/DockerSingleton.tsx

@@ -0,0 +1,19 @@
+import Docker from 'dockerode';
+
+export default class DockerSingleton extends Docker {
+  private static dockerInstance: DockerSingleton;
+
+  private constructor() {
+    super({
+      host: '192.168.1.56',
+      port: 2376,
+    });
+  }
+
+  public static getInstance(): DockerSingleton {
+    if (!this.dockerInstance) {
+      this.dockerInstance = new this();
+    }
+    return this.dockerInstance;
+  }
+}