diff --git a/Makefile b/Makefile
index 2c57ece..18e8ad1 100644
--- a/Makefile
+++ b/Makefile
@@ -18,7 +18,7 @@ endif
 	git push
 
 release: commit-release deb
-	@latest_tag=$$(git describe --tags `git rev-list --tags --max-count=1`); \
+	@latest_tag=$$(git describe --tags `git rev-list --tags --max-count=1 2>/dev/null` 2>/dev/null); \
 	comparison="$$latest_tag..HEAD"; \
 	if [ -z "$$latest_tag" ]; then comparison=""; fi; \
 	changelog=$$(git log $$comparison --oneline --no-merges --reverse); \
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..5bea720
--- /dev/null
+++ b/README.md
@@ -0,0 +1,35 @@
+Retrieve internet tickets from Fritzbox and print on a Zebra printer
+====================================================================
+
+The [AVM FRITZ!Box](https://avm.de/produkte/fritzbox/) (FB) routers have a feature to allow Internet access to specific devices only for a certain amount of time. If that time is exceeded then the owner can print [Internet Tickets](https://en.avm.de/service/fritzbox/fritzbox-7490/knowledge-base/publication/show/3408_Extending-the-online-time-permitted-in-the-parental-controls-with-tickets/) that allow another 45 minutes of surfing.
+
+The code in this repo helps to automate the retrieval and distribution of such Internet tickets.
+
+Retrieving Tickets
+------------------
+
+The `fritzbox-get-internet-tickets.py` program will connect to the FB, retrieve the 10 available Internet tickets via web scraping (there is no API for that) and print them as a list to STDOUT.
+
+Set the password via the `FRITZBOX_PASSWORD` environment variable and check the code for more options.
+
+This program is usually not used directly, unless you plan to distribute the tickets yourself.
+
+Printing Tickets
+----------------
+
+The `fritzbox-internet-ticket` program is the main program and will first retrieve the tickets from the FB and then send the first ticket to a print queue. This program also has a Desktop starter called "Print Internet Ticket".
+
+Optionally it will upload the remaining 9 Internet tickets to a Google form for further processing. To enable this feature set the `FRITZBOX_GOOGLE_FORM_ID` and `FRITZBOX_GOOGLE_FORM_ENTRY_ID` variables to suitable values (get the values from a prefilled link to your form. The form should simply contain one text entry field).
+
+Configuration
+-------------
+
+All configuration parameters are stored in `/etc/fritzbox-internet-ticket.conf` like this:
+```bash
+FRITZBOX_PASSWORD=mySuperSecretPasswort
+FRITZBOX_PRINT_QUEUE=Zebra
+FRITZBOX_GOOGLE_FORM_ID=1FAIpQLSfhbfiefhb437ghffsUW-WULIAkPL_J-RtJN_Kiu4Fhjdwshgw
+FRITZBOX_GOOGLE_FORM_ENTRY_ID=1598434206
+```
+
+Take care to protect this file with file system permissions if you are on a multi user system.
\ No newline at end of file
diff --git a/fritzbox-internet-ticket b/fritzbox-internet-ticket
index bc41f83..0542c11 100755
--- a/fritzbox-internet-ticket
+++ b/fritzbox-internet-ticket
@@ -7,6 +7,8 @@
 
 test -r /etc/fritzbox-internet-ticket.conf && source /etc/fritzbox-internet-ticket.conf
 
+export ${!FRITZBOX_*}
+
 tickets=( $(fritzbox-get-internet-tickets.py) )
 
 if test "$FRITZBOX_PRINT_QUEUE" ; then