diff --git a/Dockerfile b/Dockerfile
index 6916cabc..52ccff6a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,5 +3,7 @@ MAINTAINER Philipp C. Heckel <philipp.heckel@gmail.com>
 
 COPY ntfy /usr/bin
 
+HEALTHCHECK --interval=60s --timeout=10s CMD wget -q --tries=1 http://localhost/v1/health -O - | grep -Eo '"healthy"\s*:\s*true' || exit 1
+
 EXPOSE 80/tcp
 ENTRYPOINT ["ntfy"]
diff --git a/docs/install.md b/docs/install.md
index 06be9817..00b03639 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -14,7 +14,7 @@ We support amd64, armv7 and arm64.
 
 1. Install ntfy using one of the methods described below
 2. Then (optionally) edit `/etc/ntfy/server.yml` for the server (Linux only, see [configuration](config.md) or [sample server.yml](https://github.com/binwiederhier/ntfy/blob/main/server/server.yml))
-3. Or (optionally) create/edit `~/.config/ntfy/client.yml` (or `/etc/ntfy/client.yml`, see [sample client.yml](https://github.com/binwiederhier/ntfy/blob/main/client/client.yml))
+3. Or (optionally) create/edit `~/.config/ntfy/client.yml` (for the non-root user) or `/etc/ntfy/client.yml` (for the root user), see [sample client.yml](https://github.com/binwiederhier/ntfy/blob/main/client/client.yml))
 
 To run the ntfy server, then just run `ntfy serve` (or `systemctl start ntfy` when using the deb/rpm).
 To send messages, use `ntfy publish`. To subscribe to topics, use `ntfy subscribe` (see [subscribing via CLI](subscribe/cli.md)
diff --git a/docs/releases.md b/docs/releases.md
index 6e8cfba0..c1c78a6b 100644
--- a/docs/releases.md
+++ b/docs/releases.md
@@ -7,10 +7,16 @@ and the [ntfy Android app](https://github.com/binwiederhier/ntfy-android/release
 **Features:**
 
 * Preliminary `/v1/health` API endpoint for service monitoring (no ticket)
+* Add basic health check to `Dockerfile` ([#555](https://github.com/binwiederhier/ntfy/pull/555), thanks to [@bt90](https://github.com/bt90))
+
+**Bug fixes:**
+
+* Fix `chown` issues with RHEL-like based systems ([#566](https://github.com/binwiederhier/ntfy/issues/566)/[#565](https://github.com/binwiederhier/ntfy/pull/565), thanks to [@danieldemus](https://github.com/danieldemus))
 
 **Documentation:**
 
-* Add HTTP/2 and TLSv1.3 support to nginx docs ([#553](https://github.com/binwiederhier/ntfy/issues/553), thanks to [bt90](https://github.com/bt90))
+* Add HTTP/2 and TLSv1.3 support to nginx docs ([#553](https://github.com/binwiederhier/ntfy/issues/553), thanks to [@bt90](https://github.com/bt90))
+* Small wording change for `client.yml` ([#562](https://github.com/binwiederhier/ntfy/pull/562), thanks to [@fleopaulD](https://github.com/fleopaulD))
 
 ## ntfy server v1.30.1
 Released December 23, 2022 🎅
@@ -29,7 +35,7 @@ roll out the TLSv1.3, HTTP/2 and Unix mode changes on ntfy.sh (see [#552](https:
 * Remove `--env-topic` option from `ntfy publish` as per [deprecation](deprecations.md) (no ticket)
 * Prepared statements for message cache writes ([#542](https://github.com/binwiederhier/ntfy/pull/542), thanks to [@nicois](https://github.com/nicois))
 * Do not warn about invalid IP address when behind proxy in unix socket mode (relates to [#552](https://github.com/binwiederhier/ntfy/issues/552))
-* Upgrade nginx/ntfy config on ntfy.sh to work with TLSv1.3, HTTP/2 ([#552](https://github.com/binwiederhier/ntfy/issues/552), thanks to [bt90](https://github.com/bt90))
+* Upgrade nginx/ntfy config on ntfy.sh to work with TLSv1.3, HTTP/2 ([#552](https://github.com/binwiederhier/ntfy/issues/552), thanks to [@bt90](https://github.com/bt90))
 
 ## ntfy Android app v1.16.0
 Released December 11, 2022
diff --git a/scripts/postinst.sh b/scripts/postinst.sh
index e4ee165a..eae0b8a8 100755
--- a/scripts/postinst.sh
+++ b/scripts/postinst.sh
@@ -7,8 +7,9 @@ set -e
 if [ "$1" = "configure" ] || [ "$1" -ge 1 ]; then
   if [ -d /run/systemd/system ]; then
     # Create ntfy user/group
-    id ntfy >/dev/null 2>&1 || useradd --system --no-create-home ntfy
-    chown ntfy.ntfy /var/cache/ntfy /var/cache/ntfy/attachments /var/lib/ntfy
+    groupadd -f ntfy
+    id ntfy >/dev/null 2>&1 || useradd --system --no-create-home -g ntfy ntfy
+    chown ntfy:ntfy /var/cache/ntfy /var/cache/ntfy/attachments /var/lib/ntfy
     chmod 700 /var/cache/ntfy /var/cache/ntfy/attachments /var/lib/ntfy
 
     # Hack to change permissions on cache file
@@ -16,7 +17,7 @@ if [ "$1" = "configure" ] || [ "$1" -ge 1 ]; then
     if [ -f "$configfile" ]; then
       cachefile="$(cat "$configfile" | perl -n -e'/^\s*cache-file: ["'"'"']?([^"'"'"']+)["'"'"']?/ && print $1')" # Oh my, see #47
       if [ -n "$cachefile" ]; then
-        chown ntfy.ntfy "$cachefile" || true
+        chown ntfy:ntfy "$cachefile" || true
         chmod 600 "$cachefile" || true
       fi
     fi