fix(caddy): skip the xCaddy test build below 2 GB RAM

The container defaults to 512 MB (256 MB on Alpine), and Go's linker was
killed in xcaddy build: 14 runs on 6 hosts in a week. The build only
produced an unused binary, so below 2 GB xCaddy is installed without it
and a warning says why; install and update alike.

CHANGELOG.md

@@ -571,6 +571,29 @@ Exercise vigilance regarding copycat or coat-tailing sites that seek to exploit
 
 </details>
 
+## 2026-11-05
+
+### 🚀 Updated Scripts
+
+  - #### 🐞 Bug Fixes
+
+    - OPNsense VM: wait for the FreeBSD login prompt instead of 180 seconds [@MickLesk](https://github.com/MickLesk) ([#18467](https://github.com/community-scripts/ProxmoxVE/pull/18467))
+
+  - #### 🔧 Refactor
+
+    - Tududi: run 2.0 on PostgreSQL, keep SQLite installs on 1.15.0 [@MickLesk](https://github.com/MickLesk) ([#18465](https://github.com/community-scripts/ProxmoxVE/pull/18465))
+
+### 💾 Core
+
+  - fix: keep the existing install until the new archive has extracted [@rcourtman](https://github.com/rcourtman) ([core#201](https://github.com/community-scripts/core/pull/201))
+- fix: keep the install when a clone or an Alpine extract fails [@rcourtman](https://github.com/rcourtman) ([core#210](https://github.com/community-scripts/core/pull/210))
+
+### 🧰 Tools
+
+  - #### 🐞 Bug Fixes
+
+    - Arcane: write both env names, stop shipping the unused .env [@MickLesk](https://github.com/MickLesk) ([#18466](https://github.com/community-scripts/ProxmoxVE/pull/18466))
+
 ## 2026-11-04
 
 ### 🚀 Updated Scripts

ct/caddy.sh

@@ -55,9 +55,13 @@ update_deb_based() {
       setup_go
       fetch_and_deploy_gh_release "xcaddy" "caddyserver/xcaddy" "binary"
 
-      msg_info "Updating xCaddy"
-      $STD xcaddy build
-      msg_ok "Updated xCaddy"
+      if (($(awk '/^MemTotal:/ {print int($2 / 1024)}' /proc/meminfo) < 1900)); then
+        msg_warn "xCaddy updated; its test build was skipped because linking Caddy needs about 2 GB RAM"
+      else
+        msg_info "Updating xCaddy"
+        $STD xcaddy build
+        msg_ok "Updated xCaddy"
+      fi
     fi
   fi
   msg_ok "Updated successfully!"

install/caddy-install.sh

@@ -23,10 +23,14 @@ setup_deb_based() {
     setup_go
     fetch_and_deploy_gh_release "xcaddy" "caddyserver/xcaddy" "binary"
 
-    msg_info "Setup xCaddy"
     $STD apt install -y git
-    $STD xcaddy build
-    msg_ok "Setup xCaddy"
+    if (($(awk '/^MemTotal:/ {print int($2 / 1024)}' /proc/meminfo) < 1900)); then
+      msg_warn "xCaddy is installed; its test build was skipped because linking Caddy needs about 2 GB RAM"
+    else
+      msg_info "Setup xCaddy"
+      $STD xcaddy build
+      msg_ok "Setup xCaddy"
+    fi
   fi
 }
 
@@ -69,10 +73,14 @@ EOF
     GO_VERSION="$(curl -fsSL https://go.dev/VERSION?m=text | head -1 | cut -c3-)" setup_go
     fetch_and_deploy_gh_release "xcaddy" "caddyserver/xcaddy" "prebuild" "latest" "/opt/xcaddy" "xcaddy_*_linux_$(arch_resolve).tar.gz"
     ln -sf /opt/xcaddy/xcaddy /usr/local/bin/xcaddy
-    msg_info "Setup xCaddy"
-    cd /opt
-    $STD xcaddy build
-    msg_ok "Setup xCaddy"
+    if (($(awk '/^MemTotal:/ {print int($2 / 1024)}' /proc/meminfo) < 1900)); then
+      msg_warn "xCaddy is installed; its test build was skipped because linking Caddy needs about 2 GB RAM"
+    else
+      msg_info "Setup xCaddy"
+      cd /opt
+      $STD xcaddy build
+      msg_ok "Setup xCaddy"
+    fi
   fi
 
   msg_info "Enabling Caddy Service"