[Nginx] Invert SKIP container condition

data/Dockerfiles/nginx/docker-entrypoint.sh

@@ -8,13 +8,13 @@ until ping ${PHPFPMHOST} -c1 > /dev/null; do
   echo "Waiting for PHP..."
   sleep 1
 done
-if printf "%s\n" "${SKIP_SOGO}" | grep -E '^([yY][eE][sS]|[yY])+$' >/dev/null; then
+if ! printf "%s\n" "${SKIP_SOGO}" | grep -E '^([yY][eE][sS]|[yY])+$' >/dev/null; then
   until ping ${SOGOHOST} -c1 > /dev/null; do
     echo "Waiting for SOGo..."
     sleep 1
   done
 fi
-if printf "%s\n" "${SKIP_RSPAMD}" | grep -E '^([yY][eE][sS]|[yY])+$' >/dev/null; then
+if ! printf "%s\n" "${SKIP_RSPAMD}" | grep -E '^([yY][eE][sS]|[yY])+$' >/dev/null; then
   until ping ${RSPAMDHOST} -c1 > /dev/null; do
     echo "Waiting for Rspamd..."
     sleep 1