Move reverse-proxy to jenkins, config upgrade

Dockerfile

@@ -0,0 +1,13 @@
+ARG CADDY_VERSION=2.10.2
+
+# --- BUILD ---
+# Add cache plugin
+FROM caddy:${CADDY_VERSION}-builder AS builder
+
+RUN xcaddy build \
+    --with github.com/caddyserver/cache-handler
+
+# --- DEPLOY ---
+FROM caddy:${CADDY_VERSION}
+
+COPY --from=builder /usr/bin/caddy /usr/bin/caddy