fgm/htmx-demo: HTMX tutorial code based on the https://hypermedia.systems/ book. @ ab7878088bcf3efbfbac301927a7633ed06775a7

Frédéric G. MARAND ab7878088b Step 01.2: / redirects to /contacts.		6 月之前
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app.go	ab7878088b Step 01.2: / redirects to /contacts.	6 月之前
app.py	ab7878088b Step 01.2: / redirects to /contacts.	6 月之前