Generate timestamps on pre-commit (#58)

* Update last_modified_date on pre-commit
* Update README
* Add contributing and license section to README

generate_last_modified_data.sh → .githooks/pre-commit/01-update-last-modified-date

@@ -1,11 +1,17 @@
-#!/usr/bin/bash
+#!/usr/bin/env bash
+
 # Replace `last_modified_date` timestamp with current time
-# This script is used to update the `last_modified_date` timestamp in the frontmatter of all Markdown files in the current directory and subdirectories.
+# This script is used to update the `last_modified_date` timestamp
+# in the frontmatter of staged Markdown files.
+
+# Get the list of staged Markdown files
+staged_files=$(git diff --cached --name-only --diff-filter=ACM | grep '\.md$')
 
-# Loop through all Markdown files in the current directory and subdirectories
-find . -type f -name "*.md" | while read file; do
-    # Check if the file contains a frontmatter block
-    if grep -q "^---" "$file"; then
+# Loop through each staged Markdown file
+echo "$staged_files" | while read file; do
+    # Check if the file exists and contains a frontmatter block
+    if [[ -f "$file" ]] && grep -q "^---" "$file"; then
+        echo "Updating last_modified_date in $file"
         # Get the last modified timestamp of the file
         last_modified_timestamp=$(stat -c %Y "$file")
 
@@ -19,5 +25,8 @@ find . -type f -name "*.md" | while read file; do
             # If last_modified_date does not exist, add it after the first frontmatter delimiter
             sed -i "/^---/a last_modified_date: $last_modified_datetime_utc" "$file"
         fi
+
+        # Stage the updated file
+        git add "$file"
     fi
 done

README.md

@@ -12,6 +12,14 @@
     <a href="https://docs.gatewayd.io/">Documentation</a>
 </p>
 
+> [!IMPORTANT]
+> The pre-commit hook is used to update the `last_modified_date` field in the frontmatter for each page. It will run automatically upon committing changes if you run the following commands to enable them:
+>
+> ```bash
+> ln .git/hooks/pre-commit .githooks/pre-commit/01-update-last-modified-date
+> git config core.hooksPath .githooks
+> ```
+
 ## Running the docs locally
 
 The docs are built using [Jekyll](https://jekyllrb.com/) and the [just-the-docs](https://just-the-docs.github.io/just-the-docs/) theme. To run the docs locally, you need to have Git and Ruby installed. Then, install Jekyll and `bundler`:
@@ -54,10 +62,10 @@ For private repositories, you can set the `GITHUB_TOKEN` environment variable wi
 
 The tag can be used multiple times in the same page. A single request will be made to the GitHub API to retrieve the latest tag name for each repository.
 
-## Latest modified date
+## Contributing
 
-The `generate_last_modified_data.sh` script is used to generate the `last_modified_date` data in the frontmatter for each page. It should be run manually before pushing the changes to the `main` branch.
+We welcome contributions from everyone. Just open an [issue](https://github.com/gatewayd-io/docs/issues) or send us a [pull request](https://github.com/gatewayd-io/docs/pulls).
 
-```bash
-./generate_last_modified_data.sh
-```
+## License
+
+GatewayD is licensed under the [Affero General Public License v3.0](https://github.com/gatewayd-io/docs/blob/main/LICENSE).