Update documentation links and pre-commit workflow

- Updated the GitHub Actions pre-commit workflow to use specific commit hashes for the checkout and pre-commit actions, ensuring consistency and stability.
- Revised documentation links in index.mdx and quickstart.mdx to point to the correct paths, improving navigation for users.
- Added a note in configuration.mdx to clarify the configuration options for running Pomerium in different service modes.

These changes enhance the accuracy and usability of the documentation, providing clearer guidance for users and ensuring the pre-commit checks are up-to-date.

Author: desimone

.github/workflows/pre-commit.yml

@@ -7,9 +7,9 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@checkout@v3
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 #v3
         with:
           fetch-depth: 0
-      - uses: pre-commit/action@action@v3.0.1
+      - uses: pre-commit/action@v2c7b3805fd2a0fd8c1884dcaebf91fc102a13ecd #3.0.1
         with:
           extra_args: --show-diff-on-failure --from-ref ${{ github.event.pull_request.base.sha }} --to-ref ${{ github.event.pull_request.head.sha }}

content/docs/get-started/quickstart.mdx

@@ -112,7 +112,7 @@ Once you've connected, select **Finish**. You'll be directed to the Zero Console
 
 If you can't connect to Pomerium Zero, check out these pages for help:
 
-- [**Configure port 443 to allow inbound access**](/docs/internals/troubleshooting)
+- [**Configure port 443 to allow inbound access**](/docs/internals/troubleshooting#configure-port-443-to-allow-inbound-access)
 - [**Override IP address**](/docs/internals/clusters#detected-and-override-ip-address)
 
 :::

content/docs/index.mdx

@@ -85,4 +85,4 @@ This approach simplifies managing access to internal services—no more network-
 
 ## Next steps
 
-Ready to try it out? [Check out the Quick Start](https://www.pomerium.com/docs/quick-start) to spin up Pomerium and secure your first application.
+Ready to try it out? [Check out the Quick Start](/docs/get-started/quickstart) to spin up Pomerium and secure your first application.