postgres: fix healthcheck

Signed-off-by: Simon L. <szaimen@e.mail.de>

Containers/postgresql/Dockerfile

@@ -14,6 +14,7 @@ RUN set -ex; \
         bash \
         openssl \
         shadow \
+        netcat-openbsd \
         grep; \
     \
 # We need to use the same gid and uid as on old installations

Containers/postgresql/healthcheck.sh

@@ -6,6 +6,9 @@ fi
 
 test -f "/mnt/data/backup-is-running" && exit 0
 
-PGPASSWORD="$POSTGRES_PASSWORD" psql -h 127.0.0.1 -p 11000 -U "oc_$POSTGRES_USER" -d "$POSTGRES_DB" -c "select now()" && exit 0
+# If database import is running, do not continue with the health check
+if nc -z 127.0.0.1 11000; then
+    exit 0
+fi
 
 PGPASSWORD="$POSTGRES_PASSWORD" psql -h 127.0.0.1 -p 5432 -U "oc_$POSTGRES_USER" -d "$POSTGRES_DB" -c "select now()" || exit 1