Adding the basic stuff

Author: reyang

.github/CODEOWNERS

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+# Code owners file.
+# This file controls who is tagged for review for any given pull request.
+
+# For anything not explicitly taken by someone else:
+* @open-telemetry/demo-webstore-approvers

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Create a report to help us improve
+labels: bug
+---
+
+# Bug Report
+
+List of [all OpenTelemetry NuGet
+packages](https://www.nuget.org/profiles/OpenTelemetry) and version that you are
+using (e.g. `OpenTelemetry 1.0.2`):
+
+* TBD
+
+Runtime version (e.g. `net462`, `net48`, `netcoreapp3.1`, `net6.0` etc. You can
+find this information from the `*.csproj` file):
+
+* TBD
+
+## Symptom
+
+A clear and concise description of what the bug is.
+
+**What is the expected behavior?**
+
+What did you expect to see?
+
+**What is the actual behavior?**
+
+What did you see instead?
+
+## Reproduce
+
+Create a self-contained project using the template of your choice, apply the
+minimum required code to result in the issue you're observing.
+
+We will close this issue if:
+
+* The repro project you share with us is complex. We can't investigate custom
+  projects, so don't point us to such, please.
+* If we can not reproduce the behavior you're reporting.
+
+## Additional Context
+
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest an idea for this project
+labels: enhancement
+---
+
+# Feature Request
+
+Before opening a feature request against this repo, consider whether the feature
+should/could be implemented in the [other OpenTelemetry client
+libraries](https://github.com/open-telemetry/). If so, please [open an issue on
+opentelemetry-specification](https://github.com/open-telemetry/opentelemetry-specification/issues/new)
+first.
+
+**Is your feature request related to a problem?**
+
+If so, provide a concise description of the problem.
+
+**Describe the solution you'd like:**
+
+What do you want to happen instead? What is the expected behavior?
+
+**Describe alternatives you've considered.**
+
+Which alternative solutions or features have you considered?
+
+## Additional Context
+
+Add any other context about the feature request here.

.github/ISSUE_TEMPLATE/question.md

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+---
+name: Question
+about: Create a question to help us improve our knowledge base and documentation
+labels: question
+---
+
+# Question
+
+Use [Github Discussions](https://github.com/open-telemetry/opentelemetry-dotnet/discussions/new).

.github/PULL_REQUEST_TEMPLATE.md

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+Fixes #.
+
+## Changes
+
+Please provide a brief description of the changes here.
+
+For significant contributions please make sure you have completed the following items:
+
+* [ ] Appropriate `CHANGELOG.md` updated for non-trivial changes
+* [ ] Design discussion issue #

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    labels:
+      - "infra"

.github/workflows/checks.yml

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+name: Checks
+
+on:
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  markdownlint:
+    runs-on: ubuntu-latest
+    steps:
+    - name: check out code
+      uses: actions/checkout@v2
+
+    - name: install dependencies
+      run: npm install
+
+    - name: run markdownlint
+      run: make markdownlint
+
+  yamllint:
+    runs-on: ubuntu-latest
+    steps:
+    - name: check out code
+      uses: actions/checkout@v2
+
+    - uses: actions/setup-python@v2
+
+    - name: install yamllint
+      run: make install-yamllint
+
+    - name: run yamllint
+      run: yamllint . -f github
+
+  misspell:
+    runs-on: ubuntu-latest
+    steps:
+    - name: check out code
+      uses: actions/checkout@v2
+
+    - name: run misspell
+      run: make misspell
+
+  docfx:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 6.0.x
+
+    - name: install docfx
+      run: dotnet tool update -g docfx --version "3.0.0-*" --add-source https://docfx.pkgs.visualstudio.com/docfx/_packaging/docs-public-packages/nuget/v3/index.json
+
+    - name: run docfx
+      run: docfx build --dry-run

.github/workflows/stale.yml

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+# Syntax: https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions
+# Github Actions Stale: https://github.com/actions/stale
+
+name: "Close stale pull requests"
+on:
+  schedule:
+    - cron: "12 3 * * *"  # arbitrary time not to DDOS GitHub
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v5
+        with:
+          stale-pr-message: 'This PR was marked stale due to lack of activity and will be closed in 7 days. Commenting or Pushing will instruct the bot to automatically remove the label. This bot runs once per day.'
+          close-pr-message: 'Closed as inactive. Feel free to reopen if this PR is still being worked on.'
+          operations-per-run: 400
+          days-before-pr-stale: 7
+          days-before-issue-stale: -1
+          days-before-pr-close: 7
+          days-before-issue-close: -1

.markdownlint.yaml

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+# Default state for all rules
+default: true
+
+# allow long lines for tables and code blocks
+MD013:
+  code_blocks: false
+  tables: false

CHANGELOG.md

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+# Changelog
+
+Please update changelog as part of any significant pull request. Place short
+description of your change into "Unreleased" section. As part of release process
+content of "Unreleased" section content will generate release notes for the
+release.
+
+## Unreleased

CONTRIBUTING.md

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+# Contributing
+
+Welcome to OpenTelemetry Demo Webstore repository!
+
+Before you start - see OpenTelemetry general
+[contributing](https://github.com/open-telemetry/community/blob/main/CONTRIBUTING.md)
+requirements and recommendations.
+
+## Sign the CLA
+
+Before you can contribute, you will need to sign the [Contributor License
+Agreement](https://identity.linuxfoundation.org/projects/cncf).
+
+## Under Construction
+
+TBD