Update

Author: Dewanai1

.expo/README.md

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+> Why do I have a folder named ".expo" in my project?
+
+The ".expo" folder is created when an Expo project is started using "expo start" command.
+
+> What does the "packager-info.json" file contain?
+
+The "packager-info.json" file contains port numbers and process PIDs that are used to serve the application to the mobile device/simulator.
+
+> What does the "settings.json" file contain?
+
+The "settings.json" file contains the server configuration that is used to serve the application manifest.
+
+> Should I commit the ".expo" folder?
+
+No, you should not share the ".expo" folder. It does not contain any information that is relevant for other developers working on the project, it is specific to your machine.
+
+Upon project creation, the ".expo" folder is already added to your ".gitignore" file.

.expo/packager-info.json

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+{
+  "devToolsPort": 19002,
+  "expoServerPort": 19000,
+  "packagerPort": 19000
+}

.expo/settings.json

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+{
+  "hostType": "lan",
+  "lanType": "ip",
+  "dev": true,
+  "minify": false,
+  "urlRandomness": null,
+  "https": false,
+  "scheme": null
+}