Updates nginx and ghost

docker-compose.yml

@@ -42,7 +42,7 @@ services:
       - ./mariadb-data:/var/lib/mysql
 
   nginx:
-    image: nginx:1.17
+    image: nginx:1.19
     environment:
       - NGINX_HOST=space.abhinavsarkar.net
       - NGINX_PORT=80
@@ -158,7 +158,7 @@ services:
       - DRONE_SECRET=${DRONE_SECRET}
 
   arpita_site:
-    image: ghost:3.13.4-alpine
+    image: ghost:3.21.0-alpine
     restart: always
     volumes:
      - ./ghost/arpita_site:/var/lib/ghost/content