containerize and add basic setup to backend

docker-compose.yml

@@ -0,0 +1,22 @@
+services:
+  ui:
+    build: ./ui
+    ports:
+      - "5173:5173"
+  backend:
+    build: ./backend
+    #ports:
+      #- "7000:7000"
+  db:
+    image: postgres:17-alpine
+    ports:
+      - "5432:5432"
+    environment:
+      POSTGRES_DB: nuchat
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+    volumes:
+      - db-data:/var/lib/postgresql/data
+
+volumes:
+  db-data: