initialize backend with FastAPI and Docker setup

docker-compose.yml

@@ -0,0 +1,13 @@
+version: "3.8"
+
+services:
+  backend:
+    build: .
+    container_name: portfolio-backend
+    restart: unless-stopped
+    env_file:
+      - .env
+    ports:
+      - "8000:8000"
+    volumes:
+      - .:/app