rename guard -> mcaptcha in docker files

docker-compose.yml

@@ -1,7 +1,7 @@
 version: '3.9'
 
 services:
-  guard:
+  mcaptcha:
     build: .
     ports:
       - 7000:7000
@@ -12,10 +12,10 @@ services:
   postgres:
     image: postgres:13.2
     volumes:
-      - mcaptcha-guard-data:/var/lib/postgresql/
+      - mcaptcha-data:/var/lib/postgresql/
     environment:
       POSTGRES_PASSWORD: # enter password
-      PGDATA: /var/lib/postgresql/data/guard/
+      PGDATA: /var/lib/postgresql/data/mcaptcha/
 
 volumes:
-  mcaptcha-guard-data:
+  mcaptcha-data: