diff --git a/.eslintrc.json b/.eslintrc.json
new file mode 100644
index 0000000..afe87b2
--- /dev/null
+++ b/.eslintrc.json
@@ -0,0 +1,36 @@
+{
+  "env": {
+    "browser": true,
+    "es6": true,
+    "worker": true
+  },
+  "extends": "eslint:recommended",
+  "parserOptions": {
+    "ecmaVersion": 2015,
+    "sourceType": "script"
+  },
+  "globals": {
+    "XMLHttpRequest": "readonly",
+    "Worker": "readonly",
+    "Blob": "readonly",
+    "URL": "readonly",
+    "navigator": "readonly",
+    "document": "readonly",
+    "window": "readonly",
+    "console": "readonly",
+    "setTimeout": "readonly",
+    "clearTimeout": "readonly",
+    "setInterval": "readonly",
+    "clearInterval": "readonly",
+    "postMessage": "readonly",
+    "onmessage": "writable",
+    "addEventListener": "readonly"
+  },
+  "rules": {
+    "no-unused-vars": ["warn", { "args": "none" }],
+    "no-console": "off",
+    "no-empty": "warn",
+    "no-undef": "warn",
+    "no-const-assign": "error"
+  }
+}
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..b023cda
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,15 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "docker" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"
diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
index 422ee13..36eb698 100644
--- a/.github/workflows/docker-publish.yml
+++ b/.github/workflows/docker-publish.yml
@@ -45,7 +45,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       # Fetch the ipinfo database file using curl if API key is defined
       - name: Fetch DB from ipinfo.io
@@ -94,7 +94,7 @@ jobs:
       # https://github.com/docker/build-push-action
       - name: Build and push Docker image
         id: build-and-push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: ${{ matrix.dockerfile }}
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
new file mode 100644
index 0000000..6e242fb
--- /dev/null
+++ b/.github/workflows/stale.yml
@@ -0,0 +1,31 @@
+# This workflow warns and then closes issues and PRs that have had no activity for a specified amount of time.
+#
+# You can adjust the behavior by modifying this file.
+# For more information, see:
+# https://github.com/actions/stale
+name: Mark stale issues and pull requests
+
+on:
+  schedule:
+  - cron: '32 18 * * *'
+
+jobs:
+  stale:
+
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+
+    steps:
+    - uses: actions/stale@v10
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: 'This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.'
+        stale-pr-message: 'This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.'
+        days-before-stale: 60
+        days-before-close: 7
+        close-issue-message: 'This issue was automatically closed due to inactivity.'
+        close-pr-message: 'This pull request was automatically closed due to inactivity.'
+        stale-issue-label: 'no-issue-activity'
+        stale-pr-label: 'no-pr-activity'
diff --git a/.gitignore b/.gitignore
index b07ea8a..7c7fb63 100755
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,5 @@ results/idObfuscation_salt.php
 backend/getIP_serverLocation.php
 db-dir/
 .vscode/
+node_modules/
+package-lock.json
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 0000000..fb8c426
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1,14 @@
+node_modules/
+backend/
+results/
+docker/
+.git/
+*.php
+*.md
+*.sql
+*.mmdb
+*.phar
+*.ttf
+*.ico
+*.png
+*.gif
diff --git a/.prettierrc.json b/.prettierrc.json
new file mode 100644
index 0000000..3149967
--- /dev/null
+++ b/.prettierrc.json
@@ -0,0 +1,12 @@
+{
+  "printWidth": 120,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": true,
+  "singleQuote": false,
+  "trailingComma": "none",
+  "bracketSpacing": true,
+  "arrowParens": "avoid",
+  "endOfLine": "lf",
+  "htmlWhitespaceSensitivity": "ignore"
+}
diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
new file mode 100644
index 0000000..66e4eb4
--- /dev/null
+++ b/DEVELOPMENT.md
@@ -0,0 +1,122 @@
+# Development Guide
+
+This document describes how to use the package manager (npm) for development tasks.
+
+## Prerequisites
+
+- Node.js 14.0.0 or higher
+- npm (comes with Node.js)
+
+## Getting Started
+
+Install development dependencies:
+
+```bash
+npm install
+```
+
+## Available Scripts
+
+### Linting
+
+Check code for potential issues:
+
+```bash
+npm run lint
+```
+
+Automatically fix linting issues where possible:
+
+```bash
+npm run lint:fix
+```
+
+### Code Formatting
+
+Check code formatting (JavaScript files only):
+
+```bash
+npm run format:check
+```
+
+Format JavaScript files:
+
+```bash
+npm run format
+```
+
+> **Note**: The existing codebase uses its original formatting style. Prettier and ESLint are provided as optional tools for new code or improvements.
+
+### Validation
+
+Run all checks (formatting and linting):
+
+```bash
+npm run validate
+```
+
+### Testing
+
+Currently, there are no automated tests configured:
+
+```bash
+npm run test
+```
+
+### Docker
+
+Build Docker images:
+
+```bash
+npm run docker:build          # Standard Debian-based image
+npm run docker:build-alpine   # Alpine-based image
+```
+
+## Development Tools
+
+The package manager setup includes:
+
+- **ESLint**: JavaScript linting tool to catch common errors
+- **Prettier**: Code formatting tool to maintain consistent style
+
+These tools are configured but non-intrusive to the existing codebase.
+
+## Project Structure
+
+```
+.
+├── speedtest.js              # Main speedtest library
+├── speedtest_worker.js       # Web Worker for speed testing
+├── index.html                # Default UI
+├── backend/                  # PHP backend files
+├── examples/                 # Example implementations
+├── results/                  # Results/telemetry handling
+├── docker/                   # Docker-related files
+└── package.json              # npm package configuration
+```
+
+## Why Use a Package Manager?
+
+The package manager provides several benefits:
+
+1. **Standardized tooling**: Common commands across different environments
+2. **Development dependencies**: Easy installation of linting and formatting tools
+3. **Project metadata**: Version, description, and licensing information
+4. **Future extensibility**: Foundation for adding build tools, tests, or bundlers if needed
+5. **npm distribution**: Makes the library easy to use in other Node.js projects
+
+## Contributing
+
+When making changes:
+
+1. Run `npm run lint` to check for potential issues
+2. Consider running `npm run format` on new files for consistency
+3. Test your changes manually in a browser
+4. For PHP backend changes, test with the appropriate server setup
+
+## Notes
+
+- The core library has **no runtime dependencies** - it's pure vanilla JavaScript
+- Development dependencies (ESLint, Prettier) are only needed for development
+- The library can still be used standalone without npm (just include the JS files)
+- npm setup is completely optional and doesn't change how the library is deployed
diff --git a/Dockerfile b/Dockerfile
index e4ea1c8..365f1b6 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,13 +3,12 @@ FROM php:8-apache
 # use docker-php-extension-installer for automatically get the right packages installed
 ADD --chmod=0755 https://github.com/mlocati/docker-php-extension-installer/releases/latest/download/install-php-extensions /usr/local/bin/
 
-
-# Install extensions
-RUN install-php-extensions iconv gd pdo pdo_mysql pdo_pgsql pgsql
-
-RUN rm -f /usr/src/php.tar.xz /usr/src/php.tar.xz.asc \
-    && apt autoremove -y \
-    && rm -rf /var/lib/apt/lists/*
+# Install extensions and cleanup in a single layer to reduce image size
+RUN install-php-extensions iconv gd pdo pdo_mysql pdo_pgsql pgsql \
+    && rm -f /usr/src/php.tar.xz /usr/src/php.tar.xz.asc \
+    && apt-get autoremove -y \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 # Prepare files and folders
 RUN mkdir -p /speedtest/
@@ -40,6 +39,19 @@ ENV WEBPORT=8080
 # https://httpd.apache.org/docs/2.4/stopping.html#gracefulstop
 STOPSIGNAL SIGWINCH
 
+# Add labels for better metadata
+LABEL org.opencontainers.image.title="LibreSpeed"
+LABEL org.opencontainers.image.description="A Free and Open Source speed test that you can host on your server(s)"
+LABEL org.opencontainers.image.vendor="LibreSpeed"
+LABEL org.opencontainers.image.url="https://github.com/librespeed/speedtest"
+LABEL org.opencontainers.image.source="https://github.com/librespeed/speedtest"
+LABEL org.opencontainers.image.documentation="https://github.com/librespeed/speedtest/blob/master/doc_docker.md"
+LABEL org.opencontainers.image.licenses="LGPL-3.0-or-later"
+
+# Add health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:${WEBPORT}/ || exit 1
+
 # Final touches
 EXPOSE ${WEBPORT}
 CMD ["bash", "/entrypoint.sh"]
diff --git a/Dockerfile.alpine b/Dockerfile.alpine
index 39b2ce3..1026d95 100755
--- a/Dockerfile.alpine
+++ b/Dockerfile.alpine
@@ -15,13 +15,9 @@ RUN apk add --quiet --no-cache \
     php-session \
     php-sqlite3
 
-# use docker-php-extension-installer for automatically get the right packages installed
-ADD --chmod=0755 https://github.com/mlocati/docker-php-extension-installer/releases/latest/download/install-php-extensions /usr/local/bin/
-
-
-
-# Install extensions
-RUN install-php-extensions iconv gd pdo pdo_mysql pdo_pgsql pgsql
+# Note: PHP extensions are provided via Alpine `php-*` packages above.
+# The docker-php-extension-installer is redundant when using those packages,
+# so it's intentionally removed to simplify the image.
 
 RUN ln -sf /dev/stdout /var/log/apache2/access.log && \
     ln -sf /dev/stderr /var/log/apache2/error.log
@@ -55,6 +51,19 @@ ENV WEBPORT=8080
 # https://httpd.apache.org/docs/2.4/stopping.html#gracefulstop
 STOPSIGNAL SIGWINCH
 
+# Add labels for better metadata
+LABEL org.opencontainers.image.title="LibreSpeed"
+LABEL org.opencontainers.image.description="A Free and Open Source speed test that you can host on your server(s)"
+LABEL org.opencontainers.image.vendor="LibreSpeed"
+LABEL org.opencontainers.image.url="https://github.com/librespeed/speedtest"
+LABEL org.opencontainers.image.source="https://github.com/librespeed/speedtest"
+LABEL org.opencontainers.image.documentation="https://github.com/librespeed/speedtest/blob/master/doc_docker.md"
+LABEL org.opencontainers.image.licenses="LGPL-3.0-or-later"
+
+# Add health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD wget --no-verbose --tries=1 --spider http://localhost:${WEBPORT}/ || exit 1
+
 WORKDIR /var/www/html
 
 # Final touches
diff --git a/README.md b/README.md
index 184f377..4ae9410 100755
--- a/README.md
+++ b/README.md
@@ -59,6 +59,10 @@ A template to build an Android client for your LibreSpeed installation is availa
 
 A command line client is available [here](https://github.com/librespeed/speedtest-cli).
 
+## Development
+
+If you want to contribute or develop with LibreSpeed, see [DEVELOPMENT.md](DEVELOPMENT.md) for information about using npm for development tasks, linting, and formatting.
+
 ## Docker
 
 A docker image is available on [GitHub](https://github.com/librespeed/speedtest/pkgs/container/speedtest), check our [docker documentation](doc_docker.md) for more info about it.
diff --git a/docker/test/test-script.sh b/docker/test/test-script.sh
index 1e8661b..4bf47df 100644
--- a/docker/test/test-script.sh
+++ b/docker/test/test-script.sh
@@ -9,7 +9,7 @@ if ! apk add w3m; then
     exit 1
 fi
 
-echo sleeping a little to get things setteled...
+echo sleeping a little to get things settled...
 sleep 15
 
 for db in sqlite pg mysql; do
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..5f088ce
--- /dev/null
+++ b/package.json
@@ -0,0 +1,55 @@
+{
+  "name": "librespeed-speedtest",
+  "version": "5.4.1",
+  "description": "LibreSpeed - A Free and Open Source speed test that you can host on your server(s)",
+  "main": "speedtest.js",
+  "scripts": {
+    "test": "echo \"No automated tests configured yet\" && exit 0",
+    "lint": "eslint speedtest.js speedtest_worker.js",
+    "lint:fix": "eslint --fix speedtest.js speedtest_worker.js",
+    "format": "prettier --write \"*.js\"",
+    "format:check": "prettier --check \"*.js\"",
+    "validate": "npm run format:check && npm run lint",
+    "docker:build": "docker build -t librespeed-speedtest .",
+    "docker:build-alpine": "docker build -t librespeed-speedtest:alpine -f Dockerfile.alpine ."
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/librespeed/speedtest.git"
+  },
+  "keywords": [
+    "speedtest",
+    "speed-test",
+    "internet-speed",
+    "bandwidth",
+    "network",
+    "performance",
+    "librespeed",
+    "download",
+    "upload",
+    "ping",
+    "latency"
+  ],
+  "author": "Federico Dossena",
+  "license": "LGPL-3.0-or-later",
+  "bugs": {
+    "url": "https://github.com/librespeed/speedtest/issues"
+  },
+  "homepage": "https://github.com/librespeed/speedtest#readme",
+  "devDependencies": {
+    "eslint": "^8.57.0",
+    "prettier": "^3.1.1"
+  },
+  "files": [
+    "speedtest.js",
+    "speedtest_worker.js",
+    "index.html",
+    "favicon.ico",
+    "backend/",
+    "examples/",
+    "results/"
+  ],
+  "engines": {
+    "node": ">=14.0.0"
+  }
+}
diff --git a/speedtest.js b/speedtest.js
index a272bb1..936903b 100755
--- a/speedtest.js
+++ b/speedtest.js
@@ -330,7 +330,7 @@ Speedtest.prototype = {
         console.error("Speedtest onupdate event threw exception: " + e);
       }
       if (data.testState >= 4) {
-	  clearInterval(this.updater);
+        clearInterval(this.updater);
         this._state = 4;
         try {
           if (this.onend) this.onend(data.testState == 5);