docker-compose with 3services: postgres, pgadmin, tomcat

docker-compose.yml

+version: '3'
+
+services:
+
+  postgresql:
+    image: postgres:12.5
+    container_name: webapi_postgres
+    environment:
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: ${POSTGRES_DB}
+    volumes:
+      - ./postgres-data:/var/lib/postgresql/data
+  
+  pgadmin:
+    image: dpage/pgadmin4:4.29
+    container_name: webapi_pgadmin
+    ports:
+      -  ${PGADMIN_PORT}:5454
+    environment:
+      PGADMIN_DEFAULT_EMAIL: ${PGADMIN_DEFAULT_EMAIL}
+      PGADMIN_DEFAULT_PASSWORD: ${PGADMIN_DEFAULT_PASSWORD}
+      PGADMIN_LISTEN_PORT: 5454
+  
+  tomcat:
+    image: tomcat:8.5
+    container_name: webapi_tomcat
+    ports:
+      -  ${TOMCAT_PORT}:8080
\ No newline at end of file