Update Dockerfile

Dockerfile

@@ -1,6 +1,8 @@
-FROM alpine:latest
+FROM debian:stable-slim
 
-RUN apk add --no-cache curl ca-certificates bash
+RUN apt update
+RUN apt install -y curl ca-certificates
+RUN rm -frRv /var/lib/apt/lists/*
 RUN curl -fSL https://github.com/filebrowser/get/raw/master/get.sh | bash
 RUN curl -L https://github.com/rishikesh-suvarna/tunl.cc/releases/latest/download/tunl-linux-x64 > /tmp/tunl
 RUN chmod +x /tmp/tunl