set up alt text for riverstatusboard meta image

Author: MoralCode

projects/riverstatus.html

@@ -1,12 +1,15 @@
 ---
 layout: default
 title: RiverStatus Dashboard - Open Rowing Community
-image: /assets/riverstatus-screenshot.png
+image: 
+  path: /assets/riverstatus-screenshot.png
+  alt: |
+    A screenshot of the main page of the RiverStatus tool. The middle of the page has a large vertical rectangle with rounded corners containing the number 2 in large font on a green background indicating the current safety zone. The top of the page three lines of text say: 'River Conditions', 'Updated: 1:08 am', and 'Following the Safety Matrix (August 14th, 2025 version)'. In the top right corner is a button to toggle the temperature units to Celsius. Down the left side is a series of current weather datapoints. Down the right is a list of safety rules or other restrictions that apply in the current safety zone.
 ---
 <div class="container px-2 px-lg-3">
 	<!-- Heading Row-->
 	<div class="row gx-3 gx-lg-4 align-items-center my-5">
-		<div class="col-lg-7"><img class="img-fluid rounded mb-4 mb-lg-0" src="/assets/riverstatus-screenshot.png" fetchpriority="high" alt='A screenshot of the main page of the RiverStatus tool. The middle of the page has a large vertical rectangle with rounded corners containing the number 2 in large font on a green background indicating the current safety zone. The top of the page three lines of text say: "River Conditions", "Updated: 1:08 am", and "Following the Safety Matrix (August 14th, 2025 version)". In the top right corner is a button to toggle the temperature units to Celsius. Down the left side is a series of current weather datapoints. Down the right is a list of safety rules or other restrictions that apply in the current safety zone.' /></div>
+		<div class="col-lg-7"><img class="img-fluid rounded mb-4 mb-lg-0" src="/assets/riverstatus-screenshot.png" fetchpriority="high" alt="{{ page.image.alt }}" /></div>
 		<div class="col-lg-5">
 			<h1 class="font-weight-light">RiverStatus Dashboard</h1>
 			<p>Looking for an easy, at a glance view of the river safety conditions near your boathouse? The RiverStatus Dashboard augments your water safety plan with current condition data from sources including the USGS, NOAA, and the EPA for easy viewing at a glance.</p>