Add Dockerfile

Dockerfile

@@ -0,0 +1,68 @@
+FROM node:lts-bookworm-slim
+
+# The base name of the npm package
+ARG LINKSPECTOR_NAME=@umbrelladocs/linkspector
+# Use the argument below to select version to install, e.g.:
+# docker build --build-arg LINKSPECTOR_VERSION=0.2.7 -t umbrelladocs/linkspector .
+ARG LINKSPECTOR_VERSION=latest
+# Use the argument below the specify full package name to install,
+# empty value installs current directory, e.g.:
+# docker build --build-arg LINKSPECTOR_PACKAGE= -t umbrelladocs/linkspector .
+ARG LINKSPECTOR_PACKAGE=${LINKSPECTOR_NAME}@${LINKSPECTOR_VERSION}
+
+# Set default user
+ENV USER=node
+
+# Set installation location for node packages
+ENV NPM_GLOBAL=/home/${USER}/.npm-global
+ENV PATH=${NPM_GLOBAL}/bin:$PATH
+
+# Install chromium instead of puppeteer chrome
+# as puppeteer does not provide arm64
+# https://github.com/puppeteer/puppeteer/issues/7740
+ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD true
+ENV PUPPETEER_EXECUTABLE_PATH=/usr/bin/chromium.wrapper
+
+# Install linkspector dependencies
+RUN apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+    bash \
+    ca-certificates \
+    chromium \
+    curl \
+    git \
+    upower \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
+
+# Create app directory for mounting host files
+RUN mkdir /app && chown ${USER}:${USER} /app
+
+# chromium in order to start either needs dbus https://github.com/puppeteer/puppeteer/issues/11028
+# or skip dbus by using --remote-debugging-port=0 (any free port) https://github.com/nodejs/help/issues/3220#issuecomment-1228342313
+# Additionally, allow chromium to start without elevated capabilities needed to start the sandbox
+# See https://github.com/puppeteer/puppeteer/issues/5505
+RUN echo /usr/bin/chromium \
+         --no-sandbox \
+         --headless=new \
+         --disable-gpu \
+         --enable-chrome-browser-cloud-management \
+         --remote-debugging-port=0 \
+         > /usr/bin/chromium.wrapper
+RUN chmod ugo+x /usr/bin/chromium.wrapper
+
+# Install linkspector as node user
+USER ${USER}
+WORKDIR /home/${USER}
+RUN npm config set prefix ${NPM_GLOBAL}
+COPY --chown=${USER}:${USER} lib lib
+COPY --chown=${USER}:${USER} *.js *.json test ./
+# npm ci does not support --global
+# https://github.com/npm/cli/issues/7224
+RUN if test -z ${LINKSPECTOR_PACKAGE}; then npm ci; fi && npm install --global ${LINKSPECTOR_PACKAGE}
+
+WORKDIR /app
+
+# Run sanity checks
+RUN npm list --global
+RUN linkspector --version
+RUN linkspector check

README.md

@@ -57,12 +57,6 @@ To check hyperlinks in your markup language files, follow these steps:
     linkspector check --json
     ```
 
-1. Linkspector starts checking the hyperlinks in your files based on the configuration provided in the configuration file or using the default configuration. It then displays the results in your terminal.
-
-1. After the check is complete, Linkspector provides a summary of the results. If any dead links are found, they are listed in the terminal, along with their status codes and error messages.
-
-1. If no dead links are found, Linkspector displays a success message, indicating that all links are working.
-
 ## Configuration
 
 Linkspector uses a configuration file named `.linkspector.yml` to customize its behavior. If this file is not found in the current directory when the program is run, Linkspector displays a message saying "Configuration file not found. Using default configuration." and uses a default configuration.
@@ -227,6 +221,40 @@ If there are no errors, linkspector shows the following message:
 ✨ Success: All hyperlinks in the specified files are valid.
 ```
 
+## Using Linkspector with Docker
+
+To use Linkspector with Docker, follow these steps:
+
+1. Clone the Linkspector repository to your local machine and switch to the cloned directory:
+   ```bash
+   git clone git@github.com:UmbrellaDocs/linkspector.git
+   cd linkspector
+   ```
+1. Build the docker image locally, while being at the root (`.`) of this project:
+   ```bash
+   docker build --no-cache --pull --build-arg LINKSPECTOR_PACKAGE= -t umbrelladocs/linkspector .
+   ```
+
+1. To perform a check using the default configuration, while being at the root (`$PWD`) of the project to be checked:
+   ```bash
+   docker run --rm -it -v $PWD:/app \
+          --name linkspector umbrelladocs/linkspector \
+          bash -c 'linkspector check'
+   ```
+
+   To specify a custom configuration file path:
+   ```bash
+   docker run --rm -it -v $PWD:/app -v $PWD/custom-config.yml:/path/to/custom-config.yml \
+          --name linkspector umbrelladocs/linkspector \
+          bash -c 'linkspector check -c /path/to/custom-config.yml'
+   ```
+
+1. Linkspector starts checking the hyperlinks in your files based on the configuration provided in the configuration file or using the default configuration. It then displays the results in your terminal.
+
+1. After the check is complete, Linkspector provides a summary of the results. If any dead links are found, they are listed in the terminal, along with their status codes and error messages.
+
+1. If no dead links are found, Linkspector displays a success message, indicating that all links are working.
+
 ## What's planned
 - [x] Spinner for local runs.
 - [ ] Create a GitHub action.