docker image needs to be modified to fix postgres host name

Dockerfile

@@ -0,0 +1 @@
+FROM registry.gitlab.com/xyc0/pleroma_docker

docker-compose.yaml

@@ -9,8 +9,6 @@ volumes:
 services:
   node_a_db:
     image: postgres
-    container_name: node_a_db
-    restart: always
     environment:
       POSTGRES_USER: pleroma
       POSTGRES_DB: pleroma_dev
@@ -19,9 +17,8 @@ services:
       - node_a_db:/var/lib/postgresql/data
 
   node_a_web:
-    image: registry.gitlab.com/xyc0/pleroma_docker:latest
-    container_name: node_a_web
-    restart: always
+    build:
+      context: .
     environment:
       POSTGRES_USER: pleroma
       POSTGRES_DB: pleroma_dev
@@ -35,8 +32,6 @@ services:
 
   node_b_db:
     image: postgres
-    container_name: node_b_db
-    restart: always
     environment:
       POSTGRES_USER: pleroma
       POSTGRES_DB: pleroma_dev
@@ -45,9 +40,8 @@ services:
       - node_b_db:/var/lib/postgresql/data
 
   node_b_web:
-    image: registry.gitlab.com/xyc0/pleroma_docker:latest
-    container_name: node_b_web
-    restart: always
+    build:
+      context: .
     environment:
       POSTGRES_USER: pleroma
       POSTGRES_DB: pleroma_dev
@@ -61,8 +55,6 @@ services:
 
   node_c_db:
     image: postgres
-    container_name: node_c_db
-    restart: always
     environment:
       POSTGRES_USER: pleroma
       POSTGRES_DB: pleroma_dev
@@ -71,9 +63,8 @@ services:
       - node_c_db:/var/lib/postgresql/data
 
   node_c_web:
-    image: registry.gitlab.com/xyc0/pleroma_docker:latest
-    container_name: node_c_web
-    restart: always
+    build:
+      context: .
     environment:
       POSTGRES_USER: pleroma
       POSTGRES_DB: pleroma_dev