add some alttexts

3_rasta/2_methodology.typ

@@ -206,8 +206,6 @@ To guarantee reproducibility, we published the results, datasets, Dockerfiles an
 - on Docker Hub as `histausse/rasta-<toolname>:icsr2024`.
 ]
 
-#todo[alt text for @fig:rasta-methodo-collection]
-
 #figure(
   raw-render(```
     digraph {
@@ -259,7 +257,21 @@ To guarantee reproducibility, we published the results, datasets, Dockerfiles an
       "Pack": ("Drop2": align(center, block(inset: 1em)[Could Not Set Up\ in 4 days])),
     ),
     width: 100%,
-    alt: "",
+    alt: (
+      "A diagram showing our methodology. ",
+      "On the left their is a text 'Tools from Li et al', and a arrow ",
+      "from the text to a box labelled 'Search Tools'. ",
+      "An arrow goes down from this box, to the text 'Drop', and ",
+      "another to the right to a box labelled 'Select Tools'. ",
+      "An arrow goes down from this box, to the text 'Drop', with the ",
+      "text 'Uses Dynamic Analysis' right of the arrow. ",
+      "Another arrows goes to the right of the box to a box labelled ",
+      "'Select Source Version'. An arrow goest to the left of the box ",
+      "to a box labelled 'Package'. An arrow goes down from this box ",
+      "to the text 'Not Reusable', with the text 'Could Not Set up in ",
+      "4 days' to the right of the arrow. Another arrow goest to the ",
+      "right of the box, to the text 'Docker Images'"
+    ).join(),
   ),
   caption: [Tool selection methodology overview],
 ) <fig:rasta-methodo-collection>