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+# Contributing to Appsmith
+
+Thank you for your interest in Appsmith and taking the time to contribute on this project. 🙌 
+Appsmith is a project by developers for developers and there are a lot of ways you can contribute. 
+Feel free to propose changes to this document in a pull request.
+
+### Table of contents
+- [Code of conduct](CODE_OF_CONDUCT.md)
+- [How can I contribute?](#how-can-i-contribute)
+- [How to set up local development?](#how-to-set-up-local-development)
+- [How to run tests?](#how-to-run-tests)
+
+## How can I contribute?
+There are many ways in which we/one can to contribute to Appsmith. All contributions are highly appreciated.
+
+- Beta testing
+- Raise Issues
+- Feature Requests
+- Documentation
+- Code contribution
+    - Widgets
+    - Datasources
+
+
+## 👨‍💻 How to set up local development
+
+### Client
+Appsmith's client (UI/frontend) uses the ReactJS library and Typescript. The application also uses libraries like react-redux and redux-saga for workflows.
+ 
+##### Pre-requisites:
+
+On your development machine, please ensure that:
+
+1. You have `docker` installed in your system. If not, please visit: [https://docs.docker.com/get-docker/](https://docs.docker.com/get-docker/)
+2. You have `mkcert` installed. Please visit: [https://github.com/FiloSottile/mkcert#installation](https://github.com/FiloSottile/mkcert#installation) for details. For `mkcert` to work with firefox you may require the `nss` utility to be installed. Details are in the link above.
+3. You have `envsubst` installed. use `brew install gettext` on macOS. Linux machines usually have this installed.
+4. You have cloned the repo in your local machine.
+
+##### Create local HTTPS certificates:
+
+1. Run the following command from the project root.
+
+```bash
+cd app/client/docker && mkcert -install && mkcert "*.appsmith.com" && cd ..
+```
+
+This command will end up creating 2 files in the `docker/` directory:
+
+- `_wildcard.appsmith.com-key.pem`
+- `_wildcard.appsmith.com.pem`
+
+2. Copy the `.env.example` file and rename the new file to `.env` in the same directory. Populate the entries in the `.env` file with values to enable/toggle features.
+
+3. Run the script `start-https.sh` in order to start the nginx container that will proxy the frontend code on your local system.
+
+##### Steps to build & run the code:
+
+1. Add a domain like `dev.appsmith.com` to `/etc/hosts`. 
+
+```bash
+echo "127.0.0.1	dev.appsmith.com" | sudo tee -a /etc/hosts
+```
+
+1. Run `cd app/client`
+2. Run `yarn`
+3. Run `yarn build` (optional)
+4. Run `yarn start` if you are hitting [https://release-api.appsmith.com](https://release-api.appsmith.com) (Staging environment) as your API backend.
+5. If you are hitting any other API endpoint, 
+    - Please run:
+
+    ```shell script
+    REACT_APP_ENVIRONMENT=DEVELOPMENT HOST=dev.appsmith.com craco start
+    ```
+
+    - Change the API endpoint in the Nginx configuration available in `docker/templates/nginx-linux.conf.template` or `docker/templates/nginx-mac.conf.template`. You will have to run `start-https.sh` script again after making the change.
+
+6. Go to [https://dev.appsmith.com](https://dev.appsmith.com) on your browser
+
+#### If you are unable to run docker:
+
+1. Make the values in `nginx-mac.conf.template` empty. None of those properties are required.
+2. `proxy_pass` value must be changed from `http://host.docker.internal:3000` to `http://localhost:3000`
+3. Generate the certificates manually via `mkcert`. Check the command in `start-https-server.sh` file.
+4. Change the value of the certificate location for keys `ssl_certificate` & `ssl_certificate_key` to the place where these certificates were generated.
+
+### Server
+- We use the Spring framework in Java for all backend development.
+- We use `maven` as our build tool.
+- We use pf4j as a library for plugins.
+- We use MongoDB for our database.
+
+1. After cloning the repository, change your directory to `app/server`
+2. Run `mvn clean compile`. This generates a bunch of classes required by IntelliJ for compiling the rest of the source code. 
+3. Create a copy of the `envs/dev.env.example` 
+
+    ```shell script
+    cp envs/dev.env.example envs/dev.env
+    ```
+
+## 🧪 How to run tests
+
+##### Client
+1. In order to run the Cypress integration tests, run:
+```bash
+  yarn run test
+```
+
+2. In order to run the Jest unit tests, run:
+```bash
+  yarn run test:unit
+```
+
+##### Server
+1. Ensure that you have Redis running on your local system.
+
+2. Run the command to execute tests
+```bash
+  mvn clean package
+```
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