diff --git a/.gitignore b/.gitignore
index d09ad8e..e0cabea 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,3 +18,7 @@
 # Session exports dropped into the project directory by tooling that runs
 # alongside it. They are large and unrelated to the service.
 apsis-book.html
+
+# Diagnostics dropped beside the project while working on it, such as the
+# screenshots of a page under inspection.
+/tmp
diff --git a/frontend/index.html b/frontend/index.html
index 2cdc6b5..16e50a8 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -8,7 +8,7 @@
       name="description"
       content="Web interface for the ApsisRS computational kernels: concept documentation, a knowledge graph, the interface documentation, and online tools."
     />
-    <title>ApsisRS web service</title>
+    <title>apsis-book — ApsisRS</title>
   </head>
   <body>
     <div id="app"></div>
diff --git a/tmp/error.png b/tmp/error.png
deleted file mode 100644
index 5b9a8c2..0000000
Binary files a/tmp/error.png and /dev/null differ
diff --git a/tmp/fixed.png b/tmp/fixed.png
deleted file mode 100644
index 2a40db4..0000000
Binary files a/tmp/fixed.png and /dev/null differ
diff --git a/tmp/right.png b/tmp/right.png
deleted file mode 100644
index ded2a4a..0000000
Binary files a/tmp/right.png and /dev/null differ