diff --git a/.gitignore b/.gitignore
index 505595973..b00154ff4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,22 @@ docker-compose-logs
 package-lock.json
 dist/static/
 dist/views/
+
+# OS
+.DS_Store
+
+# IDE - VSCode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+
+# IDEs and editors
+/.idea
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
diff --git a/README.md b/README.md
index d1d7d818d..a0dae3b34 100644
--- a/README.md
+++ b/README.md
@@ -355,13 +355,13 @@ If you have Node v10+ installed locally, you can run the tests, and a local app,
 
 ```sh
 # Install dependencies
-yarn
+yarn install
 
 # Run the tests
-npm test
+yarn test
 
 # Run the app locally
-npm run dev
+yarn test:watch
 ```
 
 Once you've started the app, visit `localhost:3000` and you'll get [step-by-step instructions](https://probot.github.io/docs/development/#configuring-a-github-app) for installing it in your GitHub account so you can start pushing commits and testing it locally.
@@ -370,7 +370,7 @@ If you don’t have Node installed, you can use [Docker Compose](https://docs.do
 
 ```sh
 # Run the tests
-docker-compose run --rm app npm test
+docker compose run --rm app
 ```
 
 ## Contributing
diff --git a/docker-compose.yml b/docker-compose.yml
index a09914708..01b7bb93f 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -7,5 +7,5 @@ services:
       context: .
       args:
         NODE_ENV: development
-    command: ['npm', 'test']
+    command: ['yarn', 'test']
     entrypoint: ''
diff --git a/package.json b/package.json
index af3ca4b18..0c1a81a5b 100644
--- a/package.json
+++ b/package.json
@@ -8,14 +8,13 @@
   "repository": "https://github.com/release-drafter/release-drafter",
   "scripts": {
     "build": "ncc build action.js --target es2021",
-    "dev": "nodemon --exec \"npm start\"",
     "start": "probot run ./index.js",
     "test": "node --experimental-vm-modules node_modules/jest/bin/jest.js",
     "test:watch": "node --experimental-vm-modules node_modules/jest/bin/jest.js --watch --notify --notifyMode=change --coverage",
     "generate-schema": "node ./bin/generate-schema.js print",
     "generate-fixtures": "node ./bin/generate-fixtures.js",
     "lint": "eslint bin/*.js lib/*.js action.js index.js test/**/*.js",
-    "prettier": "prettier --write **/*.{js,md,json,yml,yaml}",
+    "prettier": "prettier --write **/*.{js,md,json,yml}",
     "postversion": "npm run test && git push && git push --tags",
     "open-releases": "open \"$(node -e 'console.log(`${require(\"./package.json\").repository}/releases`)')\"",
     "deploy": "git push -f heroku \"$(node -e 'console.log(`v${require(\"./package.json\").version}`)')\":master",