use base image alpine 3.22 and enable workflow dispatch

.gitea/workflows/prod-docker-images.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - main
+  workflow_dispatch:
 
 jobs:
   build-and-push:

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:latest
+FROM alpine:3.22
 
 #ENV PFSENSE_IP=192.168.0.1
 #ENV PFSENSE_USER=none