Update branches and Clean PR template (#7919)

Signed-off-by: Andrey Sobolev <haiodo@gmail.com>

.github/pull_request_template.md

@@ -1,5 +0,0 @@
-**Pull Request Requirements:**
-
-- Provide a brief description of the changeset.
-- Include a screenshots if applicable
-- Ensure that the changeset adheres to the [DCO guidelines](https://github.com/apps/dco).

README.md

@@ -20,7 +20,7 @@ This project offers a convenient method to host Huly using `docker`, designed fo
 
 ## Activity
 
-![Alt](https://repobeats.axiom.co/api/embed/c42c99e21691fa60ea61b5cdf11c2e0647621534.svg "Repobeats analytics image")
+![Alt](https://repobeats.axiom.co/api/embed/c42c99e21691fa60ea61b5cdf11c2e0647621534.svg 'Repobeats analytics image')
 
 ## Table of Content
 
@@ -55,26 +55,47 @@ This project offers a convenient method to host Huly using `docker`, designed fo
 To verify the installation, perform the following checks in your terminal:
 
 - Ensure that the `docker` commands are available:
+
   ```bash
   docker --version
   docker compose version
+  ```
+
 ## Fast start
 
 ```bash
 sh ./scripts/fast-start.sh
 ```
 
+## Branches & Contributing
+
+- The `main` branch is the default branch used for production deployments.
+  Changes to this branch are made from the `staging` branch once a version is ready for community use.
+
+- The `staging` branch is used for pre-release testing.
+  It is stable enough for testing but not yet ready for production deployment.
+
+- The `develop` branch is used for development and is the default branch for contributions.
+
+We periodically merge `develop` into `staging` to perform testing builds. Once we are satisfied with the build quality in our pre-release deployment, we merge changes into `main` and release a new version to the community.
+
 ## Installation
 
 You need Microsoft's [rush](https://rushjs.io) to install application.
 
 1. Install Rush globally using the command:
+
    ```bash
    npm install -g @microsoft/rush
+   ```
+
 2. Navigate to the repository root and run the following commands:
+
    ```bash
    rush install
    rush build
+   ```
+
 Alternatively, you can just execute:
 
 ```bash
@@ -129,11 +150,11 @@ sh ./scripts/create-workspace.sh
 
 Add the following line to your /etc/hosts file
 
-```
+```plain
 127.0.0.1 host.docker.internal
 ```
 
-Accessing the URL http://host.docker.internal:8087 will lead you to the app in development mode.
+Accessing the URL <http://host.docker.internal:8087> will lead you to the app in development mode.
 
 Limitations:
 
@@ -149,7 +170,7 @@ rush validate
 rushx dev-server
 ```
 
-Then go to http://localhost:8080
+Then go to <http://localhost:8080>
 
 Click on "Login with password" link on the bottom of the right panel and use the following login credentials:
 
@@ -168,13 +189,6 @@ rush update
 rush build
 ```
 
-It may also be necessary to upgrade the running database.
-
-```bash
-cd ./dev/tool
-rushx upgrade -f
-```
-
 ## Troubleshooting
 
 If a build fails, but the code is correct, try to delete the [build cache](https://rushjs.io/pages/maintainer/build_cache/) and retry.
@@ -234,4 +248,3 @@ node ./common/scripts/bump.js -p projectName
 This project is tested with BrowserStack.
 
 <sub><sup>&copy; 2025 <a href="https://hardcoreeng.com">Hardcore Engineering Inc</a>.</sup></sub>
-