Add docker-compose support and fix error when docker executing

1. Added docker-compose
2. Fixed cluster.js error
3. Change node version in Dockerfile

Author: eit

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:12.18-alpine3.12
+FROM node:16-alpine3.14
 
 EXPOSE 8061
 

cluster.js

@@ -10,6 +10,6 @@ GracefulCluster.start({
     restartOnTimeout: CONFIG.CLUSTER_WORKER_RESTART_ON_PERIOD,
     restartOnMemory: CONFIG.CLUSTER_WORKER_RESTART_ON_MEMORY_USED,
     serverFunction: function() {
-        import('./server');
+        import('./server.js');
     }
 });

docker-compose.yml

@@ -0,0 +1,10 @@
+version: "3"
+services:
+  api:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: iframely 
+    restart: always
+    ports:
+      - "8061:8061"