add docker support, move to env file, add example

compose.yml

@@ -0,0 +1,30 @@
+services:
+  booru-api:
+    container_name: booru-api
+    build:
+      context: .
+    volumes:
+      - .:/app/booru-api
+    restart: unless-stopped
+    ports:
+      - "${PORT:-6600}:${PORT:-6600}"
+    env_file:
+      - .env
+    depends_on:
+      - dragonfly-redis
+    networks:
+      - booru-network
+
+  dragonfly-redis:
+    container_name: dragonfly-redis
+    image: docker.dragonflydb.io/dragonflydb/dragonfly
+    restart: unless-stopped
+    environment:
+      REDIS_PASSWORD: ${redis_password:-pasw0rd}
+    command: ["--requirepass", "${redis_password:-pasw0rd}"]
+    networks:
+      - booru-network
+
+networks:
+  booru-network:
+    driver: bridge