services: change restart policy to unless-stopped

when we stop an app, the service containers are stopped. they
start running again on reboot.

correct restart policy is "unless-stopped" for all the containers.

src/sftp.js

@@ -101,7 +101,7 @@ async function start(existingInfra) {
     const cmd = serviceConfig.recoveryMode ? '/bin/bash -c \'echo "Debug mode. Sleeping" && sleep infinity\'' : '';
 
     const volumeMounts = dataDirs.map(v => `-v "${v.hostDir}:${v.mountDir}"`).join(' ');
-    const runCmd = `docker run --restart=always -d --name=sftp \
+    const runCmd = `docker run --restart=unless-stopped -d --name=sftp \
                 --hostname sftp \
                 --net cloudron \
                 --net-alias sftp \