Fix global version handling and unify app version across backend/frontend

Docker/push.sh

@@ -56,11 +56,8 @@ echo " Registry : ${REGISTRY}"
 echo " Tag      : ${TAG}"
 echo "============================================"
 
-if [[ "${ENGINE}" == "podman" ]]; then
-    if ! podman login --get-login "${REGISTRY}" &>/dev/null; then
-        err "Not logged in. Run:\n  podman login ${REGISTRY}"
-    fi
-fi
+log "Logging in to ${REGISTRY}"
+"${ENGINE}" login "${REGISTRY}"
 
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 # Build