update documentation, fix issue #1

README.md

@@ -2,25 +2,30 @@
 
 This program removes data of past meetings from `/var/bigbluebutton`, and deletes old Etherpad documents (meeting notes and subtitles).
 
+## prebuilt binaries
+
+You can get the current version as `.deb` package for Ubuntu 18.04 from our Gitlab CI:
+https://gitlab.senfcall.de/senfcall-public/cleanup-meeting-data/-/jobs/artifacts/master/browse/target/debian?job=package
+
 ## building
 
-Since Ubuntu 16.04 (xenial) is the current recommended platform for running BigBlueButton, it is recommended that you also use that operating system as your build environment. When using newer versions of Ubuntu or Debian to build, the installation of the `.deb` package will fail on the target server, because the binary will link against newer versions of system libraries, which are not available in Ubuntu 16.04.
+Since Ubuntu 18.04 (xenial) is the only supported platform for running BigBlueButton, it is recommended that you also use that operating system as your build environment. When using newer versions of Ubuntu or Debian to build, the installation of the `.deb` package will fail on the target server, because the binary will link against newer versions of system libraries, which are not available in Ubuntu 18.04.
 
 ```bash
+# install build dependencies
+apt install -y libssl-dev pkg-config build-essential git
+
 # get the code
 git clone https://gitlab.senfcall.de/senfcall/cleanup-meeting-data.git
 cd cleanup-meeting-data
 
-# if it's not already installed, install rust if not present
+# if it's not already installed, install rust
 curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
 source $HOME/.cargo/env
 
 # install the cargo-deb tool for building debian packages
 cargo install cargo-deb
 
-# install build dependencies
-apt install -y libssl-dev pkg-config
-
 # compile and create Debian package
 cargo deb
 ```