added folders to organize files

functions/handlers/post.js

@@ -0,0 +1,27 @@
+/* eslint-disable promise/always-return */
+exports.putPost = (req, res) => {
+    if (req.body.body.trim() === '') {
+        return res.status(400).json({ body: 'Body must not be empty!'});
+    }
+
+    const newPost = {
+        body: req.body.body,
+        userHandle: req.user.handle,
+        userImage: req.user.imageUrl,
+        createdAt: new Date().toISOString(),
+        likeCount: 0,
+        commentCount: 0
+    };
+
+    db.collection('post').add(newPost)
+        .then((doc) => {
+            const resPost = newPost;
+            resPost.postId = doc.id;
+            res.json(resPost);
+        })
+        .catch((err) => {
+            res.status(500).json({ error: 'something is wrong'});
+            console.error(err);
+        });
+};
+