feat(apisix): add Cloudron package

- Implements Apache APISIX packaging for Cloudron platform.
- Includes Dockerfile, CloudronManifest.json, and start.sh.
- Configured to use Cloudron's etcd addon.

🤖 Generated with Gemini CLI
Co-Authored-By: Gemini <noreply@google.com>

CloudronPackages/APISIX/start.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# Set APISIX prefix
+PREFIX=${APISIX_PREFIX:=/usr/local/apisix}
+
+# Generate APISIX configuration (config.yaml) to connect to Cloudron etcd
+cat <<EOF > ${PREFIX}/conf/config.yaml
+apisix:
+  etcd:
+    host:
+      - "http://${CLOUDRON_ETCD_HOST}:${CLOUDRON_ETCD_PORT}"
+    prefix: "/apisix"
+    timeout: 30
+
+# Other APISIX configuration can go here if needed
+
+EOF
+
+# Initialize APISIX
+/usr/bin/apisix init
+
+# Initialize etcd connection for APISIX
+/usr/bin/apisix init_etcd
+
+# Start OpenResty (APISIX server)
+exec /usr/local/openresty/bin/openresty -p ${PREFIX} -g 'daemon off;'