container: src: lib_hledger: fork hledger-web, log print

Gives more convenient shell control for end-user.

container/src/finance/lib/internal/lib_hledger.bash

@@ -192,8 +192,20 @@ function lib_hledger::__hledger-web()
 {
   [ -z "${global_base_args[*]}" ] && lib_utils::die_fatal
 
+  local -r _url="http://127.0.0.1:5000"
+
   hledger-web "${global_base_args[@]}" \
-    --serve --host=0.0.0.0 --base-url http://127.0.0.1:5000 --allow=view "$@"
+    --serve --host=0.0.0.0 --base-url "$_url" --allow=view "$@" 1>/dev/null &
+
+  local -r _pid=$!
+  sleep 3s
+
+  if ! ps -p "$_pid" 1>/dev/null; then
+    lib_utils::print_error "hledger-web failed. See above error message"
+  else
+    lib_utils::print_info "hledger-web started (PID ${_pid}). Point web browser to $_url"
+  fi
+
 }
 
 # vim: sw=2 sts=2 si ai et