Merge branch 'more-output' into 'master'

More output

See merge request !1

taas_client/cli.py

 from logging import error
+import time
 import sys
 from click.termui import style
 import typer
@@ -23,6 +24,11 @@ def upload_file(
     ),
     url: str = typer.Argument("http://localhost:5000/testbook", envvar="TAAS_URL"),
 ):
+    modified = round(time.time() - notebook.stat().st_mtime)
+    sec = 'second' if modified == 1 else 'seconds'
+    suffix = ', [red]make sure you saved![/]' if modified >= 10 else ''
+    console.print(f"Last change: [bold]{modified}[/bold] {sec} ago{suffix}")
+
     files = {"file": open(notebook, "rb")}
     try:
         with console.status("[bold green]Testing..."):
@@ -60,9 +66,12 @@ def upload_file(
         try:
             print(f"[red]Error: {exc.response.json().get('error')}[/]", file=sys.stderr)
             print(f"[red]Message: {exc.response.json().get('msg')}[/]", file=sys.stderr)
+            print(":boom: [bold]Submission failed![/]")
         except:
             pass
-        typer.Exit(code=1)
+        raise typer.Exit(code=1)
+
+    print(":mailbox: :heavy_check_mark: [bold]Submission successful![/]")
 
 
 def run():