Switch header and overlay images to more efficient webp

Gemfile

@@ -1,6 +1,8 @@
 source "https://rubygems.org"
 
-gem "github-pages", group: :jekyll_plugins
-gem "jekyll-include-cache"
-gem "webrick"
-gem "html-proofer"
+group :jekyll_plugins do
+    gem "github-pages"
+    gem "jekyll-include-cache"
+    gem "webrick"
+    gem "html-proofer"
+  end

_includes/head.html

@@ -15,6 +15,9 @@
 
 <!-- For all browsers -->
 <link rel="stylesheet" href="{{ '/assets/css/main.css' | relative_url }}">
+<link rel="canonical" href="{{ page.url | absolute_url }}">
+<link rel="canonical" href="{{ page.url | prepend: site.baseurl | prepend: site.url }}">
+<link rel="canonical" href="{{ site.url }}{{ site.baseurl }}{{ page.url }}">
 
 {% if site.head_scripts %}
   {% for script in site.head_scripts %}

_pages/about-peer-review.md

@@ -3,7 +3,7 @@ layout: splash
 permalink: /about-peer-review/
 title: "pyOpenSci Reviews Scientific Python Software"
 header:
-  overlay_image: images/header.png
+  overlay_image: images/header.webp
   overlay_filter: 0.8
 intro:
   - excerpt: "Our open peer review process facilitates scientists getting credit and recognition for the work they've invested in developing scientific Python tools. The peer review process also supports scientists in finding vetted and maintained software, which drives their open science workflows."

_pages/contributors.md

@@ -5,7 +5,7 @@ title: "The pyOpenSci Team & Contributors"
 excerpt: "pyOpenSci is a diverse community of people interested in building a community of practice around scientific software written in Python."
 classes:
 header:
-  overlay_image: images/header.png
+  overlay_image: images/header.webp
   overlay_filter: 0.6
 redirect_from:
   - /contributors.html

_pages/home.md

@@ -7,7 +7,7 @@ published: true
 site-map: true
 permalink: /
 header:
-  overlay_image: /images/people/header-mentored-sprints-smaller.png
+  overlay_image: /images/people/header-mentored-sprints-smaller.webp
   overlay_filter: 0.7
   actions:
     - label: "Submit a Package"
@@ -17,14 +17,14 @@ header:
 mission:
   - excerpt: "We build diverse community that supports free and open Python tools for processing scientific data. We also build technical skills needed to contribute to open source and that support open science. Join our global community."
 peer-review:
-  - image_path: images/software-peer-review.png
+  - image_path: images/software-peer-review.webp
     alt: "Light purple image that says software Peer Review. On the image is a woman at a laptop with a pyOpenSci logo on it and a cup of coffee next to her. There is a very light flower in the bottom right hand corner. "
     title: "Python Package Peer Review"
     excerpt: "We offer peer review of Python software to increase the quality, usability and long term maintenance of the open source tools that drive open science. [JOSS accepts our review as theirs](https://www.pyopensci.org/software-peer-review/partners/joss.html) so you can get the benefits of pyOpenSci and JOSS through one review."
     url: https://www.pyopensci.org/software-peer-review/about/benefits.html
     btn_label: "> Learn more about the benefits of peer review."
     btn_class: btn--inverse
-  - image_path: images/community-partnerships.png
+  - image_path: images/community-partnerships.webp
     alt: "Light purple image with a bunch from different backgrounds of stick figure people in a slightly darker color. The text on the image at the top says Community Partnerships"
     title: "Community Partnerships"
     excerpt: "We partner with domain-specific scientific Python communities such as [Pangeo](https://www.pyopensci.org/software-peer-review/partners/pangeo.html) who want to review affiliated packages. Through this collaboration, we develop community-specific standards that are used in our reviews to evaluate whether a package meets affiliation requirements. This removes the need for communities to develop their own peer review process."
@@ -52,7 +52,7 @@ peer-review:
    <div class="feature__item--left">
       <div class="archive__item">
          <div class="archive__item-teaser">
-            <img src="/images/people/pyopensci-sprint-pycon-2023.png" alt="Image showing 3 people working at 2 computers during a spring at pyCon USA 2023.">
+            <img src="/images/people/pyopensci-sprint-pycon-2023.webp" alt="Image showing 3 people working at 2 computers during a spring at pyCon USA 2023.">
          </div>
          <div class="archive__item-body">
             <h2 class="archive__item-title">Peer Review Mentorship Program</h2>

_pages/learn.md

@@ -4,7 +4,7 @@ permalink: /learn.html
 title: "Python Tutorials & Learning Resources for Scientists"
 classes: flowing
 header:
-  overlay_image: images/headers/pyopensci-learn-header.png
+  overlay_image: images/headers/pyopensci-learn-header.webp
   overlay_filter: 0.3
 scientists:
   - image_path: images/pyopensci-people-at-computer.jpg

_pages/packaging-resources.md

@@ -5,7 +5,7 @@ permalink: /python-packaging-science.html
 title: "Python packaging resources for scientists"
 excerpt: "We make the scientific Python package ecosystem easier to navigate through peer review and packaging resources."
 header:
-  overlay_image: images/header.png
+  overlay_image: images/header.webp
   overlay_filter: 0.8
 intro:
   - excerpt: "There are many tools and approaches that can be used to create a Python package. We build resources that help you both understand the tool ecosystem and also learn how to create a Python package using modern best practices."

_pages/partners.md

@@ -4,7 +4,7 @@ permalink: /partners.html
 title: "pyOpenSci Community Partners: affiliated package review"
 classes: flowing
 header:
-  overlay_image: images/header.png
+  overlay_image: images/header.webp
   overlay_filter: 0.6
 intro:
   - excerpt: "More here on community partners."

_pages/python-packages.md

@@ -4,7 +4,7 @@ permalink: /python-packages.html
 title: "pyOpenSci Open Peer Review & Accepted Packages"
 classes:
 header:
-    overlay_image: images/header.png
+    overlay_image: images/header.webp
     overlay_filter: 0.6
 intro:
     - excerpt: "The scientific Python packages below have