Moved base images docker repo back to jc21, as

docker is sunsetting free teams and this open source project isn't prepared to pay 300 shmackaroos for a nicer image url

docker/docker-compose.dev.yml

@@ -39,7 +39,7 @@ services:
     restart: unless-stopped
 
   npm-stepca:
-    image: nginxproxymanager/testca
+    image: jc21/testca
     container_name: "npm.stepca"
     volumes:
       - ./dev/resolv.conf:/etc/resolv.conf:ro