Initial stack implementation (#2)

* Initial stack implementation

Based on the tiny variant: https://github.com/paketo-buildpacks/jammy-tiny-stack/tree/e9a41436b06d3c3fa2960980ea98be36796ab3b6

Changes:
- Renamed
  - search and replace `tiny` with `base`
  - change stack id from `io.buildpacks.stacks.jammy.base` to `io.buildpacks.stacks.jammy` as suggested in #1
- Updated README
- Updated description
- Recreated the `Dockerfile` of the run image based on the build image `Dockerfile`
- Added some packages from bionic base stack
- Updated the integration test (use a simple java app instead of go)

Co-authored-by: Philipp Stehle <[email protected]>

* address review comments

Co-authored-by: Philipp Stehle <[email protected]>

* remove explicit libc6

Co-authored-by: Philipp Stehle <[email protected]>

Co-authored-by: Sumit Kulhadia <[email protected]>
Co-authored-by: Ralf Pannemans <[email protected]>

Author: 3 people

.github/CODEOWNERS

@@ -0,0 +1 @@
+* @paketo-buildpacks/stacks-maintainers

.github/labels.yml

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+- name: status/possible-priority
+  description: This issue is ready to work and should be considered as a potential priority
+  color: F9D0C4
+- name: "release-issue"
+  description: Automated issue alerting to release workflow failure
+  color: 941515
+- name: status/prioritized
+  description: This issue has been triaged and resolving it is a priority
+  color: BFD4F2
+- name: status/blocked
+  description: This issue has been triaged and resolving it is blocked on some other issue
+  color: 848978
+- name: bug
+  description: Something isn't working
+  color: d73a4a
+- name: enhancement
+  description: A new feature or request
+  color: a2eeef
+- name: documentation
+  description: This issue relates to writing documentation
+  color: D4C5F9
+- name: semver:major
+  description: A change requiring a major version bump
+  color: 6b230e
+- name: semver:minor
+  description: A change requiring a minor version bump
+  color: cc6749
+- name: semver:patch
+  description: A change requiring a patch version bump
+  color: f9d0c4
+- name: good first issue
+  description: A good first issue to get started with
+  color: d3fc03

.github/workflows/approve-bot-pr.yml

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+name: Approve Bot PRs and Enable Auto-Merge
+
+on:
+  workflow_run:
+    workflows: ["Test Pull Request"]
+    types:
+    - completed
+
+jobs:
+  download:
+    name: Download PR Artifact
+    if: ${{ github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success' }}
+    runs-on: ubuntu-latest
+    outputs:
+      pr-author: ${{ steps.pr-data.outputs.author }}
+      pr-number: ${{ steps.pr-data.outputs.number }}
+    steps:
+    - name: 'Download artifact'
+      uses: paketo-buildpacks/github-config/actions/pull-request/download-artifact@main
+      with:
+        name: "event-payload"
+        repo: ${{ github.repository }}
+        run_id: ${{ github.event.workflow_run.id }}
+        workspace: "/github/workspace"
+        token: ${{ secrets.PAKETO_BOT_GITHUB_TOKEN }}
+    - id: pr-data
+      run: |
+        echo "::set-output name=author::$(jq -r '.pull_request.user.login' < event.json)"
+        echo "::set-output name=number::$(jq -r '.pull_request.number' < event.json)"
+
+  approve:
+    name: Approve Bot PRs
+    needs: download
+    if: ${{ needs.download.outputs.pr-author == 'paketo-bot' || needs.download.outputs.pr-author == 'dependabot[bot]' }}
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check Commit Verification
+      id: unverified-commits
+      uses: paketo-buildpacks/github-config/actions/pull-request/check-unverified-commits@main
+      with:
+        token: ${{ secrets.PAKETO_BOT_REVIEWER_GITHUB_TOKEN }}
+        repo: ${{ github.repository }}
+        number: ${{ needs.download.outputs.pr-number }}
+
+    - name: Check for Human Commits
+      id: human-commits
+      uses: paketo-buildpacks/github-config/actions/pull-request/check-human-commits@main
+      with:
+        token: ${{ secrets.PAKETO_BOT_REVIEWER_GITHUB_TOKEN }}
+        repo: ${{ github.repository }}
+        number: ${{ needs.download.outputs.pr-number }}
+
+    - name: Checkout
+      if: steps.human-commits.outputs.human_commits == 'false' && steps.unverified-commits.outputs.unverified_commits == 'false'
+      uses: actions/checkout@v3
+
+    - name: Approve
+      if: steps.human-commits.outputs.human_commits == 'false' && steps.unverified-commits.outputs.unverified_commits == 'false'
+      uses: paketo-buildpacks/github-config/actions/pull-request/approve@main
+      with:
+        token: ${{ secrets.PAKETO_BOT_REVIEWER_GITHUB_TOKEN }}
+        number: ${{ needs.download.outputs.pr-number }}
+
+    - name: Enable Auto-Merge
+      if: steps.human-commits.outputs.human_commits == 'false' && steps.unverified-commits.outputs.unverified_commits == 'false'
+      run: |
+        gh pr merge ${{ needs.download.outputs.pr-number }} --auto --rebase
+      env:
+        GITHUB_TOKEN: ${{ secrets.PAKETO_BOT_GITHUB_TOKEN }}