Greatly simplify docker-compose.yaml

Remove pgadmin and specific version for compose

docker-compose.yml

@@ -1,8 +1,9 @@
-version: '3.5'
+version: '3'
 
 services:
   button:
     build: .
+    image: site:local
     labels:
       - "traefik.http.routers.button.rule=Host(`button.localhost`)"
       - "traefik.http.services.button-service.loadbalancer.server.port=8000"
@@ -20,7 +21,7 @@ services:
       - DJANGO_SUPERUSER_PASSWORD=django
 
   postgres:
-    image: postgres:12
+    image: postgres:13
     volumes:
       - data:/var/lib/postgresql/data 
     environment:
@@ -29,19 +30,8 @@ services:
     ports: 
       - 5432:5432
 
-  pgadmin:
-    image: dpage/pgadmin4:4
-    labels:
-      - "traefik.http.routers.pgadmin.rule=Host(`pgadmin.localhost`)"
-      - "traefik.http.services.pgadmin-service.loadbalancer.server.port=80"
-    volumes:
-      - pgadmin:/var/lib/pgadmin
-    environment:
-      PGADMIN_DEFAULT_EMAIL: postgres
-      PGADMIN_DEFAULT_PASSWORD: postgres
-
   traefik:
-    image: traefik:v2.2
+    image: traefik:v2.4
     labels:
       - "traefik.http.routers.traefik.rule=Host(`traefik.localhost`)"
       - "traefik.http.services.traefik-service.loadbalancer.server.port=8080"
@@ -53,4 +43,3 @@ services:
 
 volumes:
   data:
-  pgadmin: