Skills docker-helper
📦

docker-helper

Content revision r1 High Risk ⚙️ External commands🌐 Network access🔑 Env variables

Build Better Docker Setups

Container setup can be slow, insecure, and hard to debug. This skill helps Claude, Codex, and Claude Code generate Dockerfiles, Compose files, and troubleshooting steps using container best practices.

Supports: Claude Codex Code(CC)
⚠️ 38 Poor

Install with my Agent

Copy this request to your Agent. It includes the canonical Skill page and manifest.

Agent request
Review the Skillstore skill "docker-helper" from https://skillstore.io/skills/curiouslearner-docker-helper.md and its manifest at https://skillstore.io/api/skills/curiouslearner-docker-helper/manifest. Verify the artifact. Stop and obtain explicit user consent before installing or changing files.

Your Agent should still show its plan and request any confirmation required by the security policy.

Agent-readable resources

Use these links when an AI agent, crawler, or script needs clean context instead of reading the full page.

Markdown detail GET /skills/curiouslearner-docker-helper.md Signed manifest GET /api/skills/curiouslearner-docker-helper/manifest Signed lockfile GET /api/skills/curiouslearner-docker-helper/lockfile

Test it

Using "docker-helper". Generate a Dockerfile for a Node.js API.

Expected outcome:

A concise Dockerfile plan using dependency caching, a production stage, non-root user execution, exposed port, and a health check.

Using "docker-helper". My API cannot connect to Postgres in Docker Compose.

Expected outcome:

  • Check that both services share a network.
  • Use the Compose service name as the database hostname.
  • Confirm database readiness with a health check before the API starts.

Using "docker-helper". Optimize this Dockerfile for smaller images.

Expected outcome:

A review that recommends multi-stage builds, narrower copy steps, cache-friendly dependency installation, and a minimal runtime image.

Security Audit

High Risk
v11 • 7/9/2026 Open versioned report

The skill is primarily Docker instructional content and most static command findings are false positives from Markdown code fences. Real issues remain around examples that normalize hardcoded database credentials, sensitive .env usage, interactive shell access, and destructive Docker cleanup commands without strong safety warnings.

1
Files scanned
475
Lines analyzed
5
Review items
0
False positives ignored

Confirmed security concerns (4)

High
SKILL.md:167
Environment file access
- .env
The Compose example loads a .env file and nearby lines include database credentials. This is legitimate Compose usage, but it handles sensitive configuration and needs stronger secret-handling guidance.
High
SKILL.md:339
Environment file access
# .env*
The .dockerignore example correctly excludes .env files from images. The finding is real sensitive-file handling context, but the usage is defensive rather than malicious.
High
SKILL.md:163-192
Sample Compose File Normalizes Hardcoded Credentials
The Compose example places POSTGRES_PASSWORD=password and a database URL with user:password directly in the YAML. This can lead users to copy insecure secret handling into real projects.
The sample credentials are visible in the Compose example and are not replaced with placeholders or secret references in that block.
Medium
SKILL.md:442-444
Destructive Docker Cleanup Commands Lack Safety Warning
The Docker command reference includes docker system prune -a and docker volume prune without a warning that these commands can remove local images, containers, and volumes.
The commands are explicit and destructive in normal Docker usage. The surrounding text does not add a confirmation or dry-run warning.
Capability review items (5)

These are real local capabilities that may be expected for this skill, so they require review but are not counted as confirmed malicious behavior.

High
SKILL.md:164
Database connection strings
- DATABASE_URL=postgresql://user:password@db:5432/myapp
The Compose example includes a database URL with a literal username and password. Even as sample content, it teaches hardcoded credentials instead of secret management.
High
SKILL.md:386
Database connection strings
DATABASE_URL=postgresql://db:5432/myapp # 'db' is service name
The troubleshooting example includes a database URL inline in configuration. It lacks a password, but it still normalizes embedding connection strings directly in files.
Medium
SKILL.md:420-445
Ruby/shell backtick execution
```bash
This Docker command reference includes cleanup commands such as docker system prune -a and docker volume prune. Those commands can delete local images, containers, and volumes if copied without confirmation.
Medium
SKILL.md:373
Unix shell invocation
docker run -it <image> /bin/sh
The example tells users to start an interactive shell inside a container. This is legitimate troubleshooting, but it can expose container internals and should be framed as an explicit debug-only action.
Medium
SKILL.md:431
Unix shell invocation
docker exec -it myapp /bin/sh
The example tells users to execute an interactive shell inside a running container. This is useful for debugging but expands access to the container environment and should require user intent.

Risk Factors

⚙️ External commands (35)
SKILL.md:41-79 SKILL.md:79-82 SKILL.md:82-103 SKILL.md:103-106 SKILL.md:106-130 SKILL.md:130-135 SKILL.md:135-240 SKILL.md:240-243 SKILL.md:243-280 SKILL.md:280-284 SKILL.md:284-290 SKILL.md:290-295 SKILL.md:295-309 SKILL.md:309-312 SKILL.md:312-321 SKILL.md:321-324 SKILL.md:324-340 SKILL.md:340-344 SKILL.md:344-363 SKILL.md:363-368 SKILL.md:368-377 SKILL.md:377-380 SKILL.md:380-392 SKILL.md:392-395 SKILL.md:395-402 SKILL.md:402-405 SKILL.md:405-416 SKILL.md:416-420 SKILL.md:420-445 SKILL.md:445-449 SKILL.md:449-461 SKILL.md:461-465 SKILL.md:465-469 SKILL.md:373 SKILL.md:431
🌐 Network access (5)
SKILL.md:456 SKILL.md:148 SKILL.md:180 SKILL.md:456 SKILL.md:460
🔑 Env variables (3)
SKILL.md:164 SKILL.md:165 SKILL.md:386
Audited by: claude View Audit History →
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Open versioned report
Security Assessment

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Academic citations (APA · BibTeX · CFF)

APA citation

CuriousLearner. (2026). docker-helper security audit report (audit version 11) [Author version unspecified]. Skillstore. https://skillstore.io/skills/curiouslearner-docker-helper/audits/11

BibTeX citation

@techreport{curiouslearner-curiouslearner-docker-helper-2026, author = {CuriousLearner}, title = {docker-helper security audit report (audit version 11)}, institution = {Skillstore}, year = {2026}, number = {11}, url = {https://skillstore.io/skills/curiouslearner-docker-helper/audits/11}, note = {Author version unspecified} }

CITATION.cff

cff-version: 1.2.0 message: "If you use this Skill, cite its author and this versioned security audit report." title: "docker-helper security audit report (audit version 11)" version: "unspecified" type: report authors: - name: "CuriousLearner" date-released: "2026-07-09" url: "https://skillstore.io/skills/curiouslearner-docker-helper/audits/11" identifiers: - type: other value: "skillstore:curiouslearner-docker-helper:audit:11" description: "Skillstore immutable audit report identifier"

Skillstore Score

Why this score Evidence Confidence: Medium
55
Architecture
85
Maintainability
87
Content
71
Community
83
Spec Compliance

What You Can Build

Create a first container setup

Generate a Dockerfile and Compose file for a new application with common services and health checks.

Improve existing container builds

Review Docker files for image size, caching, non-root execution, and security hardening opportunities.

Debug local Compose failures

Use structured checks for logs, networking, service readiness, volumes, and shell access during development.

Try These Prompts

Generate a Dockerfile 
Use docker-helper to create a Dockerfile for my project. Ask for the language, start command, port, and package manager before writing the file.
Create a Compose stack 
Use docker-helper to draft a docker-compose.yml for a web app, API, database, and cache. Include networks, volumes, health checks, and clear placeholders for secrets.
Optimize container builds 
Use docker-helper to review my Dockerfile for build cache, multi-stage build opportunities, image size, and non-root execution. Explain each recommended change.
Troubleshoot production-like failures 
Use docker-helper to diagnose why my Compose services fail to start. Build a safe step-by-step investigation plan for logs, health checks, networking, volumes, and resource limits.

Best Practices

  • Review generated commands before running them against local or shared Docker resources.
  • Replace sample credentials with secret management or environment-specific configuration.
  • Validate generated Docker and Compose files with local builds and health checks.

Avoid

  • Do not copy sample passwords or database URLs into production Compose files.
  • Do not run Docker cleanup commands without checking which images, containers, and volumes will be removed.
  • Do not rely on generated container files without testing service startup and networking.

Frequently Asked Questions

Can this skill create Dockerfiles from scratch?
Yes. It provides patterns for common Node.js, Python, and Go applications, then adapts them to project details.
Does it support Docker Compose?
Yes. It includes examples for multi-service stacks with networks, volumes, health checks, and service dependencies.
Will it run Docker commands automatically?
No. It provides command guidance. Any host command execution depends on the AI tool and user approval.
Is it safe for production secrets?
Use caution. The skill includes sample credentials, so users must replace them with proper secret management.
Can it reduce image size?
Yes. It recommends multi-stage builds, cache-friendly layers, minimal base images, and cleanup in the same layer.
Which tools can use this skill?
The report lists support for Claude, Codex, and Claude Code.

Developer Details

License

MIT

Skillstore revision

r1

Version notice

The author did not declare a version.

Repository

https://github.com/CuriousLearner/devkit/tree/main/skills/docker-helper

Ref

1ffa7643651792ccb4bd3b15d924d2c97edff755

Maintenance freshness

7/18/2026

Usage

7 downloads · 235 views

File structure

📄 SKILL.md