Update Dockerfile

Dockerfile

@@ -1,7 +1,9 @@
 FROM ubuntu:22.04
 
-RUN apt update && apt install -y curl
+WORKDIR /alist
 
-RUN curl -fsSL "https://alist.nn.ci/v3.sh" | bash -s install
+COPY alist /alist
 
-EXPOSE 8080
+RUN ./alist server
+
+EXPOSE 5244