Clean up dockerfile

DiscordChatExporter.Cli.dockerfile

@@ -42,11 +42,13 @@ ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false
 ENV LC_ALL=en_US.UTF-8
 ENV LANG=en_US.UTF-8
 
+# Use a non-root user to ensure that the files shared with the host are accessible by the host user
+# https://github.com/Tyrrrz/DiscordChatExporter/issues/851
+USER $APP_UID
+
 # This directory is exposed to the user for mounting purposes, so it's important that it always
 # stays the same for backwards compatibility.
 WORKDIR /out
 
-COPY --from=build /tmp/dce/DiscordChatExporter.Cli/bin/publish /opt/app
-
-USER $APP_UID
+COPY --from=build /tmp/app/DiscordChatExporter.Cli/bin/publish /opt/app
 ENTRYPOINT ["/opt/app/DiscordChatExporter.Cli"]