diff --git a/caddy.md b/caddy.md
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--- /dev/null
+++ b/caddy.md
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+apt install --no-install-recommends curl gpg
+
+curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' | gpg --dearmor -o /usr/share/keyrings/caddy-stable-archive-keyring.gpg
+curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt' | tee /etc/apt/sources.list.d/caddy-stable.list
+chmod o+r /usr/share/keyrings/caddy-stable-archive-keyring.gpg
+chmod o+r /etc/apt/sources.list.d/caddy-stable.list
+apt update
+apt install caddy