fix: explicitly pass DB_HOST=db and DB_PORT=5432 for TCP connection

tests/test.sh

@@ -51,6 +51,7 @@ done
 
 echo "Starting TTRSS..."
 docker run -d --name "$CONTAINER_NAME" \
+  -e DB_HOST=db -e DB_PORT=5432 \
   --link "$DB_CONTAINER:db" -p 8080:8080 "$IMAGE"
 
 echo "Waiting for TTRSS to be ready..."
@@ -72,7 +73,7 @@ if [ "$READY" = false ]; then
 fi
 
 echo "Updating TT-RSS database schema..."
-echo yes | docker exec -i -u www-data "$CONTAINER_NAME" php /var/www/ttrss/update.php --update-schema 2>&1 || true
+echo yes | docker exec -i -u www-data -e DB_HOST=db -e DB_PORT=5432 "$CONTAINER_NAME" php /var/www/ttrss/update.php --update-schema 2>&1 || true
 sleep 2
 
 # Test 1: HTTP status