PoS: restructure and revision

Author: hsutaiyu

docs/pos/how-to/troubleshoot/reporting-issues.md

@@ -1,9 +1,14 @@
 
 ## Where to report a bug
 
-For any bugs or attacks that are discovered, you need to report them to the [Immunefi bug bounty program](https://immunefi.com/bounty/polygon/). 
+Any discovered bugs or vulnerabilities related to our Bug Bounty Program should be reported as follows:
+
+- For websites and applications: https://hackerone.com/polygon-technology
+- For smart contracts: https://immunefi.com/bounty/polygon
+- For security inquiries, please contact us at security@polygon.technology. (Please disclose vulnerabilities through the bug bounty program)
 
 !!! info
+
     Performing an attack and not providing submission of your proof will result in disqualification of your attempt.
 
 Make sure you add all relevant details such as your email address and Discord ID. Providing ample details creates a rapport of communication, and helps the Polygon team evaluate your submission appropriately.
@@ -12,14 +17,25 @@ Make sure you add all relevant details such as your email address and Discord ID
 
 Once an issue is reported, the Polygon team reviews it, comments, and updates on the status of the issue. After evaluation, the Polygon team reports the outcome of the submission. The severity of the issue also gets tagged as per the evaluation.
 
-## Contact us for further questions
-
-Submitters of issues can connect with the community leaders via email or tag the validator-support-team on Discord.
+## Contact us for all other questions
 
 ### Via E-mail
 
-* Parvez — parvez.shaikh@polygon.technology
+- For node operators: node-support@polygon.technology
+- For validators: validator-support@polygon.technology
+
+### Via support portal
+
+- Visit the support portal at [support.polygon.technology](https://support.polygon.technology/).
+- Sign in using your email address and select **Submit a Ticket** located in the top right corner.
+
+![Polygon support portal](../../../img/pos/support-portal-1.png)
+
+- Tha above page appears. To ensure an accurate response, please include the following details when submitting your ticket:
+    - The versions of Bor and Heimdall you are using.
+    - At least one hour of logs related to the affected services.
+    - The `config.toml` files for the affected services.
 
 ### Via Discord
 
-* Check out the @validator-support-team channel on our [Discord](https://discord.com/invite/0xPolygonCommunity) server.
+- Please visit the **#pos-full-node-queries** channel on our [Discord](https://discord.com/invite/0xPolygonCommunity) server and feel free to post your questions there. We will address your queries directly in that channel.

docs/pos/reference/errors.md

@@ -345,6 +345,17 @@ nav:
           - Technical FAQs: pos/how-to/troubleshoot/technical-faqs.md
           - Known issues and errors: pos/how-to/troubleshoot/known-issues.md
           - Reporting issues: pos/how-to/troubleshoot/reporting-issues.md
+        - Reference:
+          - Contracts:
+            - Genesis contracts: pos/reference/contracts/genesis-contracts.md
+            - Delegation via validator shares: pos/reference/contracts/delegation.md
+            - Staking manager: pos/reference/contracts/stakingmanager.md 
+          - Rewards and staking incentives: pos/reference/rewards.md
+          - Default ports for nodes: pos/reference/port-management.md
+          - Common commands: pos/reference/commands.md
+          - RPC endpoints: pos/reference/rpc-endpoints.md
+          - PoS mainnet multi-signatures: pos/reference/commit-chain-multisigs.md
+          - Mapped tokens: pos/reference/mapped-tokens.md
       - Governance:
         - Governance fundamentals: pos/governance/governance-fundamentals.md
         - Delegate tokens: pos/how-to/delegate.md
@@ -367,18 +378,6 @@ nav:
             - Topup: pos/architecture/heimdall/topup.md
             - Chain management: pos/architecture/heimdall/chain-management.md
             - Governance: pos/architecture/heimdall/governance.md
-      - Reference:
-        - Contracts:
-          - Genesis contracts: pos/reference/contracts/genesis-contracts.md
-          - Delegation via validator shares: pos/reference/contracts/delegation.md
-          - Staking manager: pos/reference/contracts/stakingmanager.md 
-        - Rewards and staking incentives: pos/reference/rewards.md
-        - Default ports for nodes: pos/reference/port-management.md
-        - Common commands: pos/reference/commands.md
-        - Node errors: pos/reference/errors.md
-        - RPC endpoints: pos/reference/rpc-endpoints.md
-        - PoS mainnet multi-signatures: pos/reference/commit-chain-multisigs.md
-        - Mapped tokens: pos/reference/mapped-tokens.md
       - Concepts: 
           - Concepts: pos/concepts/index.md
           - Tokens: