Files from .gitignore are not included in the final snap build

snapcraft
1

Hi everyone!
I’m trying to build snap using snapcraft, but for some reason some files that are included in .gitignore are not included in the final snap build. I’m using core22 and confinement: strict
For example, I have a config.json file in the root of my project, it is also included in .gitignore file, after running snapcraft and installing my snap I can’t find config.json in it’s place but It’s needed to run the app.
Perhaps I can somehow specify additional files to include.
I would be very grateful for your help. And here is my snapcraft.yaml:

version: git
summary: summary
description: description


confinement: strict
base: core22


apps:
 my-app:
   command: bin/my-app
   daemon: simple
   plugs:
     - write-files
     - network-bind
     - network


plugs:
 write-files:
   interface: system-files
   write:
     - /etc/my-dir


parts:
 my-app:
   plugin: npm
   npm-include-node: true
   npm-node-version: 16.0.0
   source: .
   build-packages:
     - build-essential
     - pkg-config
     - libsystemd-dev```