add initial script

README.md

@@ -1 +1,70 @@
 # acme-tiny renewal script
+
+![acme-tiny](https://github.com/diafygi/acme-tiny) is a tiny, auditable script that you can throw on your server to issue and renew Let's Encrypt certifica
+This script allows you to automate certifications with the acme-tiny script. 
+
+You need the following ressources. For detailed guide see acme-tiny repository.
+  * acme-tiny script
+  * account.key             (registered by letsencrypt)
+  * letsencrypt root cert   (for creating fillchain cert, automated download)
+  * openssl.conf            (for certs with multi domains)
+  * domain.conf
+
+
+There is a little script I wrote fast to make my life easier. It is very simple and I guarantee for nothing - use it at your own risk ;). 
+
+## usage
+
+For each domain certificate you need a directory within a domain.conf file.
+The domain.conf file contains the information about the domain.
+
+example domain.conf:
+
+```
+NAME="domain"
+DOMAINS=(cloud.domain.com domain.net)
+```
+
+Then you can run the script with the direcotry. 
+
+```./renew-cert.sh <directory>```
+
+It will create the .csr and .key (4096 bit) file if they don't exists. Then issue a certificate with acme-tiny.py
+
+## cronjob examples
+
+```
+11 3 5 */2 * user sh /certs/renew_cert.sh domain.com
+11 3 5 */2 * user sh /certs/renew_cert.sh $(< /srv/certs/opt/domains) >> /certs/opt/renew_cert.log
+11 3 5 */2 * user sh /certs/renew_cert.sh $(< /srv/certs/opt/domains) >> /certs/opt/renew_cert.log && docker exec -ti proxy -s nginx reload
+
+```
+
+## other
+
+domains.txt (list of domain directories for run all at once):
+
+```
+dir1  dir2  dir3 ...
+```
+
+
+
+openssl.conf (for .csr):
+
+```[req]
+distinguished_name = req_distinguished_name
+req_extensions = v3_req
+
+[req_distinguished_name]
+C = <DE>
+ST = <XXX>
+L = <Berlin>
+O = <Organization>
+CN = <XXX>
+
+[v3_req]
+keyUsage = keyEncipherment, dataEncipherment
+extendedKeyUsage = serverAuth
+```
+

renew_cert.sh

@@ -15,7 +15,6 @@ openssl_conf=$opt_folder/openssl.conf
 #############
 # script
 
-
 # check if needed files are provided
 if [ $# -eq 0 ]; then
   echo "No arguments provided."