fix json-server (FIX #187)

json-server/docker-compose.yml

@@ -1,8 +1,11 @@
-json-server:
-  image: vimagick/json-server
-  command: -H 0.0.0.0 -p 3000 -w db.json
-  ports:
-    - "3000:3000"
-  volumes:
-    - ./data:/data
-  restart: always
+version: "3.8"
+services:
+  json-server:
+    image: vimagick/json-server
+    command: -H 0.0.0.0 -p 3000 -w db.json
+    init: true
+    ports:
+      - "3000:3000"
+    volumes:
+      - ./data:/data
+    restart: unless-stopped