added entrypoint.sh to fix an issue when trying to exit the command

Dockerfile

@@ -1,10 +1,14 @@
 FROM alpine:latest
 LABEL Description="This image is based on alpine:latest and is used to generate Wireguard keys" \
       Author="david@socialnerds.org" \
-      Version="0.2" \
+      Version="0.2.1" \
       License="MIT"
 
 RUN apk --no-cache add cargo && \
     cargo install wireguard-vanity-address
 
-ENTRYPOINT ["/root/.cargo/bin/wireguard-vanity-address"]
+COPY entrypoint.sh /root/
+
+ENTRYPOINT ["/root/entrypoint.sh"]
+
+CMD ["-h"]

entrypoint.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+/root/.cargo/bin/wireguard-vanity-address $@