Fix linkcheck issues

Author: stevepiercy

docs/conf.py

@@ -79,6 +79,7 @@
     # Ignore specific anchors
     r"https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/Errors#Identifying_the_issue",
     r"https://github.com/browserslist/browserslist#queries",
+    r"https://github.com/plone/cookiecutter-zope-instance#options",
     r"https://github.com/plone/plone.docker#for-basic-usage",
     r"https://github.com/plone/plone.rest#cors",
     r"https://github.com/plone/plone.volto/blob/6f5382c74f668935527e962490b81cb72bf3bc94/src/kitconcept/volto/upgrades.py#L6-L54",

docs/glossary.md

@@ -98,7 +98,7 @@ CloudFormation
 
 Travis CI
     Travis CI is a hosted, distributed continuous integration service used to build and test software projects hosted at GitHub.
-    Open source projects may be tested with limited runs via [travis-ci.org](https://travis-ci.org).
+    Open source projects may be tested with limited runs via [travis-ci.com](https://www.travis-ci.com/).
 
 Solr
     [Solr](https://solr.apache.org/) is a popular, blazing-fast, open source enterprise search platform built on Apache Lucene.

docs/install/index.md

@@ -21,7 +21,7 @@ What do you want to do?
     -   [Plone 6 with Volto frontend](https://6.demo.plone.org/)
     -   [Plone 5.2.x with Barceloneta frontend](https://demo.plone.org/)
 -   [Run Plone in containers](containers/index) (why use containers here.)
--   {doc}`source` (contribute to Plone packages, develop add-ons, or install Plone with full control)
+-   {doc}`installation-from-packages` (contribute to Plone packages, develop add-ons, or install Plone with full control)
 
 
 (install-index-choose-installation-method-label)=
@@ -32,7 +32,7 @@ What do you want to do?
 Explanation when to choose which installation method: container vs installation from its packages. Combination for backend and frontend?
 ```
 
-Developers may choose to install Plone from either [the official container images](containers/index) or [source](source).
+Developers may choose to install Plone from either [the official container images](containers/index) or [packages](installation-from-packages).
 
 The Plone 6 container images are compliant with the [Open Container Initiative (OCI)](https://opencontainers.org/).
 They should work with any OCI-compliant container engine for developing, managing, and running Plone 6 images.
@@ -63,7 +63,7 @@ Perhaps merge the subsequent section into this section?
 System requirements depend upon your choice of installation method:
 
 -   [Use container images](containers/index)
--   {doc}`source`
+-   {doc}`installation-from-packages`
 
 
 ```{toctree}

docs/install/installation-from-packages.md

@@ -356,7 +356,7 @@ You can change this, but then you need to change some Volto frontend configurati
 
 Submit the form and your backend is ready.
 
-- If you created a Plone site with a Classic UI frontend, then you have completed the installation. Nearly. Enable your add-ons [^enable-add-ons].
+- If you created a Plone site with a Classic UI frontend, then you have completed the installation. Nearly. Enable your add-ons.[^enable-add-ons]
 
 - If you created a Plone site with a Volto frontend, continue with the next steps in section {ref}`install-source-volto-frontend-label`.
 
@@ -570,6 +570,4 @@ pm2 stop plone_backend_tutorial
 % - {term}`cookiecutter-plone-starter`
 
 
-## Footnotes
-
 [^enable-add-ons]: enable add-ons (non-Plone-core packages) in {guilabel}`Site Setup` [http://localhost:8080/Plone/prefs_install_products_form](http://localhost:8080/Plone/prefs_install_products_form).