refacto: reorganize folder tree to split lora gateway stack from app

Those stack won't necessarily be on the same host, so they need to be
split

app/docker-compose.yml

@@ -0,0 +1,4 @@
+services:
+  consumer:
+    build: ./consumer
+    restart: unless-stopped

lora-gateway/docker-compose.yml

@@ -51,11 +51,11 @@ services:
       - chirpstack
 
   postgres:
-    image: postgres:14-alpine
+    image: postgres:18-alpine
     restart: unless-stopped
     volumes:
       - ./configuration/postgresql/initdb:/docker-entrypoint-initdb.d
-      - postgresqldata:/var/lib/postgresql/data
+      - db:/var/lib/postgresql
     environment:
       - POSTGRES_USER=chirpstack
       - POSTGRES_PASSWORD=chirpstack
@@ -66,7 +66,7 @@ services:
     restart: unless-stopped
     command: redis-server --save 300 1 --save 60 100 --appendonly no
     volumes:
-      - redisdata:/data
+      - redis:/data
 
   mosquitto:
     image: eclipse-mosquitto:2
@@ -76,12 +76,6 @@ services:
     volumes: 
       - ./configuration/mosquitto/config/:/mosquitto/config/
 
-  application:
-    build: ./app
-    restart: unless-stopped
-    depends_on: 
-      - mosquitto
-
 volumes:
-  postgresqldata:
-  redisdata:
+  db:
+  redis: