client: src: lib_gen: filter custom Dockerfile's .in files

Adds filter to remove noisy license clutter in custom Dockerfile output.

This is needed because of the amount of `edit` used on the file.

The license still applies, regardless.

client/src/docker/lib/internal/lib_gen.bash

@@ -455,7 +455,6 @@ function lib_gen::__gen_client()
       local _confirm="${_read:-y}"
       if [[ "$_confirm" == [yY] || -z "$global_arg_confirm" ]]; then
         cp -a "$global_custom_dockerfile" "${global_custom_dockerfile}_${global_suffix}" || lib_utils::die_fatal
-        cp -fa "$global_repo_custom_dockerfile" "$global_custom_dockerfile" || lib_utils::die_fatal
       fi
     else
       lib_utils::print_custom "    \e[32m│\e[0m\n"
@@ -463,10 +462,16 @@ function lib_gen::__gen_client()
 
       lib_utils::print_debug "$global_repo_custom_dockerfile"
       lib_utils::print_debug "$global_custom_dockerfile"
-
-      cp -a "$global_repo_custom_dockerfile" "$global_custom_dockerfile"
     fi
 
+    # Filter to de-clutter output file (license cleanup)
+    local -r _filter="1,17d"
+
+    sed \
+      -e "$_filter" \
+      -e "s:@DOCKER_FINANCE_VERSION@:${global_client_version}:g" \
+      "$global_repo_custom_dockerfile" >"$global_custom_dockerfile" || lib_utils::die_fatal
+
     lib_utils::print_custom "    \e[32m│  └─\e[34m Edit file now? [Y/n] \e[0m"
     lib_gen::__gen_edit "$global_custom_dockerfile"
   fi