feat(github): add issue templates

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug report
+description: Create a report to help us improve
+title: "[Bug]: "
+labels:
+  - bug
+assignees:
+  - KodekaTeamOfficial
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for taking the time to fill out this bug report.
+
+  - type: textarea
+    id: bug-description
+    attributes:
+      label: Describe the bug
+      description: A clear and concise description of what the bug is.
+      placeholder: Describe the issue...
+    validations:
+      required: true
+
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: To Reproduce
+      description: Steps to reproduce the behavior.
+      placeholder: |
+        1. Go to '...'
+        2. Click on '...'
+        3. Scroll down to '...'
+        4. See error
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected-behavior
+    attributes:
+      label: Expected behavior
+      description: A clear and concise description of what you expected to happen.
+    validations:
+      required: true
+
+  - type: textarea
+    id: screenshots
+    attributes:
+      label: Screenshots
+      description: If applicable, add screenshots to help explain your problem.
+
+  - type: dropdown
+    id: operating-system
+    attributes:
+      label: Operating System
+      options:
+        - Ubuntu
+        - Debian
+        - CentOS
+        - AlmaLinux
+        - Rocky Linux
+        - Fedora
+        - Other
+    validations:
+      required: true
+
+  - type: input
+    id: os-version
+    attributes:
+      label: OS Version
+      placeholder: e.g. Ubuntu 24.04
+    validations:
+      required: true
+
+  - type: input
+    id: browser
+    attributes:
+      label: Browser
+      placeholder: e.g. Chrome, Firefox, Safari
+
+  - type: input
+    id: doktainer-version
+    attributes:
+      label: Doktainer Version
+      placeholder: e.g. v1.2.3
+    validations:
+      required: true
+
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: Additional context
+      description: Add any other context about the problem here.
+
+  - type: checkboxes
+    id: terms
+    attributes:
+      label: Before submitting
+      options:
+        - label: I have searched for existing issues before creating this report.
+          required: true
+        - label: I am using the latest available version of Doktainer.
+          required: false

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: true
+
+contact_links:
+  - name: Questions & Discussions
+    url: https://github.com/DoktainerApp/doktainer/discussions
+    about: Please ask and answer questions here.

.github/ISSUE_TEMPLATE/documentation.yml

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+name: Documentation
+description: Report missing, incorrect, or unclear documentation
+title: "[Docs]: "
+labels:
+  - documentation
+assignees:
+  - KodekaTeamOfficial
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Help us improve Doktainer's documentation.
+
+  - type: textarea
+    id: issue
+    attributes:
+      label: Documentation issue
+      description: What is missing, incorrect, or unclear?
+      placeholder: |
+        The installation guide is missing Docker Compose examples.
+    validations:
+      required: true
+
+  - type: textarea
+    id: suggestion
+    attributes:
+      label: Suggested improvement
+      description: How should the documentation be improved?
+      placeholder: |
+        Add a section explaining how to deploy Doktainer behind Cloudflare.
+    validations:
+      required: true
+
+  - type: input
+    id: page
+    attributes:
+      label: Related page or file
+      description: Link or path to the affected documentation.
+      placeholder: README.md or docs/installation.md
+
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: Additional context
+      description: Screenshots, examples, references, etc.
+
+  - type: checkboxes
+    id: terms
+    attributes:
+      label: Before submitting
+      options:
+        - label: I have searched for existing documentation issues before creating this report.
+          required: true

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature request
+description: Suggest an idea for this project
+title: "[Feature]: "
+labels:
+  - enhancement
+assignees:
+  - KodekaTeamOfficial
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for helping improve Doktainer.
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: Is your feature request related to a problem?
+      description: Describe the problem you're trying to solve.
+      placeholder: |
+        I'm always frustrated when...
+    validations:
+      required: true
+
+  - type: textarea
+    id: solution
+    attributes:
+      label: Describe the solution you'd like
+      description: A clear and concise description of what you want to happen.
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Describe alternatives you've considered
+      description: Any alternative solutions or features you've considered.
+
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: Additional context
+      description: Add any other context, screenshots, or mockups here.
+
+  - type: checkboxes
+    id: terms
+    attributes:
+      label: Before submitting
+      options:
+        - label: I have searched for existing feature requests before creating this issue.
+          required: true