Fix haproxy-behind docker image version

docker-compose-parts/haproxy-behind.yml

@@ -3,6 +3,8 @@ version: '3.7'
 services:
   isard-sso-haproxy:
     build:
+      args:
+        HAPROXY_IMG:
       context: ${BUILD_ROOT_PATH}/docker/haproxy
       dockerfile: Dockerfile-behind
       target: production

docker/haproxy/Dockerfile-behind

@@ -1,4 +1,5 @@
-FROM haproxy:lts-alpine3.15 as production
+ARG HAPROXY_IMG
+FROM $HAPROXY_IMG as production
 
 USER root
 RUN apk add openssl certbot py-pip