Add Gitea code indexing config

src/hosting/gitea.md

@@ -342,6 +342,23 @@ PASSWD         = `password`
 
 `USER` must be your primary Fastmail email. `PASSWD` is an application password. `FROM` can be your primary or an alias email.
 
+### Enable code search
+1. `sudo vim /etc/gitea/app.ini`
+2. Add `[indexer]` per the below.
+3. `sudo systemctl restart gitea`
+4. After some time, run `sudo du -sh /var/lib/gitea/indexers` to check index size.
+	- `sudo ls -lhR /var/lib/gitea/indexers/repos.bleve` will list file sizes and dates.
+
+```
+[indexer]
+REPO_INDEXER_ENABLED = true
+REPO_INDEXER_PATH = indexers/repos.bleve
+UPDATE_BUFFER_LEN = 20
+MAX_FILE_SIZE = 1048576
+REPO_INDEXER_INCLUDE = **.md,**.ts
+REPO_INDEXER_EXCLUDE =
+```
+
 ### Useful commands
 ```bash
 # View Gitea disk usage.