Added Issue and PR Templates

.github/ISSUE_TEMPLATE/1-bug-report.md

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+---
+name: "\U0001F41B Bug Report"
+about: Create a bug report to help us improve
+---
+
+<!--
+Thank you for reporting an issue with the Node.js image.
+
+Please fill in as much of the template below as you're able.
+-->
+
+## Environment
+
+* **Platform**:
+* **Docker Version**:
+* **Node.js Version**:
+* **Image Tag**:
+
+## Expected Behavior
+
+<!--
+Tell us what should happen. If possible please provide textual output instead of screenshots.
+-->
+
+## Current Behavior
+
+<!--
+Tell us what happens instead of the expected behavior. If possible please provide textual output instead of screenshots.
+-->
+
+## Possible Solution
+
+<!--
+Suggest a fix/reason for the bug in case you have an idea.
+-->
+
+## Steps to Reproduce
+
+<!--
+Tell us about the steps you took to encounter this bug with the image.
+-->
+
+## Additional Information
+
+<!--
+Tell us anything else you think we should know.
+-->
+

.github/ISSUE_TEMPLATE/2-feature-request.md

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+---
+name: "\U0001F680 Feature Request"
+about: Suggest an idea for this project
+---
+
+<!--
+Thank you for suggesting an idea to make the Node.js image better.
+
+Please fill in as much of the template below as you're able.
+-->
+
+## Problem
+
+<!--
+Please describe the problem you are trying to solve.
+-->
+
+## Solution
+
+<!--
+Please describe the desired behavior.
+-->
+
+## Alternatives to Consider
+
+<!--
+Please describe alternative solutions or features you have considered.
+-->
+

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Need help with Node.js?
+    url: https://github.com/nodejs/help
+    about: Please file an issue in our help repo.
+  - name: Found a problem with Node.js beyond the API reference documentation?
+    url: https://github.com/nodejs/nodejs.org/issues/new/choose
+    about: Please file an issue in the Node.js website repository.
+  - name: Want to report security issues or vulnerabilites?
+    url: https://github.com/nodejs/docker-node/security/policy
+    about: Please go through our policy for reporting CVEs and security issues.
+  - name: Need help with common questions related to using Node.js with Docker?
+    url: https://stackoverflow.com/questions/tagged/node.js%2bdocker%2bdockerfile
+    about: Please visit Stack Overflow to explore related questions and answers.

.github/PULL_REQUEST_TEMPLATE.md

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+<!--
+Provide a general summary of your changes in the Title above.
+-->
+
+## Description
+
+<!--
+Describe your changes in detail.
+-->
+
+## Motivation and Context
+
+<!--
+Why is this change required? What problem does it solve?
+If it fixes an open issue, please link to the issue here.
+-->
+
+## Testing Details
+
+<!--
+Please describe in detail how you tested your changes. Include details of
+your testing environment, and the tests you ran to see how your change
+affects other areas of the code, etc.
+-->
+
+## Example Output(if appropriate)
+
+## Types of changes
+
+<!--
+What types of changes does your code introduce? Put an `x` in all the boxes that apply.
+-->
+
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to change)
+
+## Checklist
+
+<!--
+Go over all the following points, and put an `x` in all the boxes that apply.
+If you're unsure about any of these, don't hesitate to ask. We're here to help!
+-->
+
+- [ ] My code follows the code style of this project.
+- [ ] My change requires a change to the documentation.
+- [ ] I have updated the documentation accordingly.
+- [ ] I have read the **CONTRIBUTING.md** document.
+- [ ] All new and existing tests passed.
+