add Dockerfile and Caddyfile for deployment container builds

Caddyfile

@@ -0,0 +1,9 @@
+{
+    default_sni web
+}
+
+localhost {
+    tls /tls/tls.crt /tls/tls.key
+    root * /srv
+    file_server
+}

Dockerfile

@@ -0,0 +1,14 @@
+# Package versions
+ARG HUGO_VERSION="v0.147.1"
+ARG CADDY_VERSION="2.10.0"
+
+# Stage 1: Build
+FROM ghcr.io/gohugoio/hugo:${HUGO_VERSION} AS builder
+WORKDIR /project
+COPY . .
+RUN hugo build
+
+# Stage 2: Package
+FROM docker.io/caddy:${CADDY_VERSION}
+COPY Caddyfile /etc/caddy/Caddyfile
+COPY --from=builder /project/public /srv