add: post image uploads (supporter)

crates/app/src/public/html/communities/feed.html

@@ -78,15 +78,21 @@
     async function create_post_from_form(e) {
         e.preventDefault();
         await trigger("atto::debounce", ["posts::create"]);
-        fetch("/api/v1/posts", {
-            method: "POST",
-            headers: {
-                "Content-Type": "application/json",
-            },
-            body: JSON.stringify({
+
+        // create body
+        const body = new FormData();
+        body.append(
+            "body",
+            JSON.stringify({
                 content: e.target.content.value,
                 community: "{{ community.id }}",
             }),
+        );
+
+        // ...
+        fetch("/api/v1/posts", {
+            method: "POST",
+            body,
         })
             .then((res) => res.json())
             .then((res) => {