Removed redundant info from db volume names

docker-compose/ghost-stack/docker-compose.yml

@@ -4,7 +4,7 @@
 # Ghost is very particular about it's variables, hence the odd format
 
 volumes:
-  ghost-db:
+  db:
 
 networks:
   <NETWORK_NAME>:
@@ -39,4 +39,4 @@ services:
       - <NETWORK_NAME>
     restart: unless-stopped
     volumes:
-      - ghost-db:/var/lib/mysql
+      - db:/var/lib/mysql

docker-compose/linkding-stack/docker-compose.yml

@@ -4,7 +4,7 @@
 # postgres Docker Hub: https://hub.docker.com/_/postgres
 
 volumes:
-  linkding-db:
+  db:
 
 networks:
   <NETWORK_NAME>:
@@ -42,4 +42,4 @@ services:
       - <NETWORK_NAME>
     restart: unless-stopped
     volumes:
-      - linkding-db:/var/lib/postgresql/data
+      - db:/var/lib/postgresql/data

docker-compose/wikijs-stack/docker-compose.yml

@@ -4,7 +4,7 @@
 # postgres Docker Hub: https://hub.docker.com/_/postgres
 
 volumes:
-  wikijs-db:
+  db:
 
 networks:
   <NETWORK_NAME>:
@@ -41,4 +41,4 @@ services:
       - <NETWORK_NAME>
     restart: unless-stopped
     volumes:
-      - wikijs-db:/var/lib/postgresql/data
+      - db:/var/lib/postgresql/data