:wrench: Make every image in content fluid

To prevent images that are not responsive.

src/include/css/custom/main.css

@@ -150,3 +150,7 @@ table tbody + tbody {
     border-top: 2px solid #dee2e6;
 }
 
+.generated-body img { /* img-fluid */
+    max-width: 100%;
+    height: auto;
+}