Update Dockerfile

Dockerfile

@@ -1,5 +1,25 @@
 FROM debian:stable-slim
+
 WORKDIR app
+
 COPY app ./app
-RUN chmod +x /app/app && /app/app -h
+
+RUN chmod +x /app/app && /app/app -h && apt-get update && apt-get install -y curl ca-certificates && apt-get clean
+
+COPY <<-"EOF" /app/resolv.conf
+nameserver 1.1.1.1
+nameserver 1.0.0.1
+nameserver 2606:4700:4700::1111
+nameserver 2606:4700:4700::1002
+EOF
+
+COPY --chmod=755 <<-"EOF" /entrypoint.sh
+#!/bin/bash
+cat /app/resolv.conf > /etc/resolv.conf
+sleep 3
+exec "$@"
+EOF
+
+ENTRYPOINT ["/entrypoint.sh"]
+
 CMD ["/app/app"]