restructure: all-in-one deploy dir — www/ for frontend, context: . for builds

deploy/docker-compose.yml

@@ -1,8 +1,8 @@
 services:
   backend:
     build:
-      context: ../backend
-      dockerfile: ../deploy/Dockerfile
+      context: .
+      dockerfile: Dockerfile
     container_name: project-tracker-api
     restart: unless-stopped
     volumes:
@@ -15,8 +15,8 @@ services:
 
   nginx:
     build:
-      context: ../frontend
-      dockerfile: ../deploy/Dockerfile.nginx
+      context: .
+      dockerfile: Dockerfile.nginx
     container_name: project-tracker-nginx
     restart: unless-stopped
     ports: