diff --git a/README.md b/README.md
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+This repository conatins everything needed to create and renew LetsEncrypt certificates (incl. wildcard certificates) on Dynu (https://www.dynu.com/).
+This should work on machine that can run docker (I'm using it on a QNAP NAS).
+If you already have certbot installed you can also just use the scripts in the scripts folder, without docker.
+
+h1. Usage with docker-compose:
+You will need Docker and Docker-Compose:
+https://docs.docker.com/install/
+https://docs.docker.com/compose/install/
+
+docker-compose -f <PATH_TO_FILES>/certbot/docker-compose.yml up
+
+Cronjob to run it twice daily (like recomended by Certbot, certificates are only renewed when needed):
+0 0,12 * * * python -c 'import random; import time; time.sleep(random.random() * 3600)' && docker-compose -f <PATH_TO_FILES>/certbot/docker-compose.yml up
+
+h1. Usage with locally installed certbot:
+Required packages: certbot, jq, curl
+certbot certonly --manual-public-ip-logging-ok --non-interactive --agree-tos --email <PUT_YOUR_EMAIL_HERE> --manual --preferred-challenges=dns --manual-auth-hook <PATH_TO_FILES>/script-pre.sh --manual-cleanup-hook <PATH_TO_FILES>/script-post.sh -d YOURDOMAIN.TLD -d *.YOURDOMAIN.TLD
diff --git a/certbot/Dockerfile b/certbot/Dockerfile
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+FROM certbot/certbot:latest
+
+RUN apk update \
+ && apk add jq curl\
+ && rm -rf /var/cache/apk/*
diff --git a/docker-compose.yml b/docker-compose.yml
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+++ b/docker-compose.yml
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+version: "3"
+
+services:
+    certbot:
+        build: certbot
+        volumes:
+            - /etc/letsencrypt/:/etc/letsencrypt/
+            - ./scripts:/scripts/
+        logging:
+             driver: json-file
+             options:
+                 max-size: "10m"
+                 max-file: "1"
+        command: certonly --manual-public-ip-logging-ok --non-interactive --agree-tos --email <PUT_YOUR_EMAIL_HERE> --manual --preferred-challenges=dns --manual-auth-hook /scripts/script-pre.sh --manual-cleanup-hook /scripts/script-post.sh -d YOURDOMAIN.TLD -d *.YOURDOMAIN.TLD
diff --git a/scripts/script-post.sh b/scripts/script-post.sh
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+++ b/scripts/script-post.sh
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+#!/bin/sh
+api_key='<PUT_YOUR_API_KEY_HERE>'
+domainID='<PUT_YOUR_DOMAIN_ID_HERE>'
+
+while
+        records=$(curl -s -X GET "https://api.dynu.com/v2/dns/$domainID/record" -H  "accept: application/json" -H "API-Key: $api_key")
+        identifier=$(echo $records  | jq '.dnsRecords[] | select(.nodeName=="_acme-challenge")' | jq '.id' | head -n 1) 
+        if [ ! -z "$identifier" ]
+        then
+            echo "Delete: $identifier"
+        	curl -s -X DELETE "https://api.dynu.com/v2/dns/$domainID/record/$identifier" -H  "accept: application/json" -H "API-Key: $api_key"
+	fi
+        [[ ! -z "$identifier" ]]
+do
+        continue
+done
diff --git a/scripts/script-pre.sh b/scripts/script-pre.sh
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+++ b/scripts/script-pre.sh
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+#!/bin/sh
+api_key='<PUT_YOUR_API_KEY_HERE>'
+domainID='<PUT_YOUR_DOMAIN_ID_HERE>'
+
+
+#Create record
+resultCreate=$(curl -s -X POST "https://api.dynu.com/v2/dns/$domainID/record" -H  "accept: application/json" -H  "Content-Type: application/json" -d "{\"nodeName\":\"_acme-challenge\",\"recordType\":\"TXT\",\"ttl\":60,\"state\":true,\"group\":\"\",\"textData\":\"$CERTBOT_VALIDATION\"}" -H "API-Key: $api_key")
+echo $resultCreate
+sleep 30