add docker & api route

[wvl94]

💡 PR Summary generated by FirstMate

Overview: Added Docker support and a new API route for enhanced functionality.

Changes:
Dockerfile:

• Created a Dockerfile to containerize the application using Node.js 19-alpine.
• Set environment variable for PORT and configured user permissions.

API Route:

• Added a new route /get/:id in exampleRouter.js to retrieve data by ID.

Configuration Update:

• Changed default server port from 8080 to 80 in appConfig.js.

TLDR: Introduced Docker support, added a new API route for data retrieval, and updated the default server port. Review the Dockerfile and new route in exampleRouter.js.

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[firstmatebot]

PR Review

⚠️ It seems that you can still improve the quality of your PR:

    ❌ Documentation drift: Update documentation for port changes (8080 and 80) in Dockerfile and appConfig.js.
    ❌ Security issues: Missing permission middleware on '/get/:id' route.
    ❌ Docker best practices: Implement multi-stage builds in Dockerfile for efficiency and security.

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[firstmatebot]

You changed the application to run on port 8080 in the Dockerfile. This change seems important, so it might be smart to change the documentation accordingly. Additionally, the default server port in appConfig.js has been changed to 80. Ensure the documentation reflects the correct ports for running the application.

Example snippet for documentation:

## Running the Application

To run the application, use the following command:

```bash
docker run -p 8080:8080 your-image-name

The application will be accessible at http://localhost:8080.

Configuration

The application listens on port 80 by default unless overridden by the PORT environment variable.

[firstmatebot]

The route '/get/:id' is missing the grantAccessByPermissionMiddleware, which is essential for proper permission checks. Update the route definition to include this middleware as follows:

+ router.route("/get/:id").get(grantAccessByPermissionMiddleware([API_PERMISSIONS.PUBLIC_ENDPOINT]), exampleController.getById)

This ensures that access permissions are validated before executing the controller logic.

(Based on guideline 'Routes should check permissions')

[firstmatebot]

Consider using multi-stage builds in your Dockerfile to improve build efficiency and security by separating the build and runtime environments. For example:

FROM node:19-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .

FROM node:19-alpine
WORKDIR /app
COPY --from=builder /app .
CMD ["npm", "start", "--no-update-notifier"]

This approach will help reduce the final image size and enhance security by not including unnecessary build tools in the production image.

(Based on guideline 'Dockerfiles should use multi-stage builds')

[firstmatebot]

I analysed the failed pipeline job Validate docker:

Failure Analysis

The pipeline crashed during the Docker build step, specifically at the command RUN apk add --no-cache git. The error logs indicate a permission issue:

ERROR: Unable to lock database: Permission denied
ERROR: Failed to open apk database: Permission denied

This suggests that the appuser, which is set as the user in the Dockerfile, does not have the necessary permissions to install packages using apk. The relevant part of the Dockerfile is:

USER appuser
RUN apk add --no-cache git

Since appuser lacks the required permissions, the command fails, causing the pipeline to crash.

Suggested Fix

To resolve this issue, you can modify the Dockerfile to install the required packages before switching to the non-root user. Here’s the proposed change:

- USER appuser
+ RUN apk add --no-cache git
+ USER appuser

This change ensures that the apk add command runs with root privileges, allowing the installation of git without permission issues. After making this change, the pipeline should successfully build the Docker image.

[firstmatebot]

I analysed the failed pipeline job Validate docker:

Failure Analysis

The pipeline crashed during the Docker build step, specifically at the command RUN apk add --no-cache git. The error logs indicate a permission issue:

ERROR: Unable to lock database: Permission denied
ERROR: Failed to open apk database: Permission denied

This suggests that the appuser, which is set as the user in the Dockerfile, does not have the necessary permissions to install packages using apk. The relevant part of the Dockerfile is:

USER appuser
RUN apk add --no-cache git

Since appuser is not a root user, it cannot perform operations that require elevated privileges, such as modifying the package database.

Suggested Fix

To resolve this issue, you can switch back to the root user before running the apk add command and then switch back to appuser afterward. Modify the Dockerfile as follows:

- USER appuser
+ USER root
RUN apk add --no-cache git
+ USER appuser

This change allows the installation of git to proceed without permission issues, while still ensuring that the application runs as a non-root user afterward for security reasons.