ACME CA API endpoint URI as env parameter

README.md

@@ -143,6 +143,22 @@ $ docker run -d -p 80:80 -p 443:443 \
     jwilder/nginx-proxy
 ```
 
+##### Optional container environment variables
+
+Optional nginx-proxy-letsencrypt container environment variables for custom configuration.
+
+- `ACME_CA_URI` - Directory URI for the CA ACME API endpoint (default: ``https://acme-v01.api.letsencrypt.org/directory``)
+
+For example
+
+```
+$ docker run -d -p 80:80 -p 443:443 \
+    -e ACME_CA_URI="https://acme-staging.api.letsencrypt.org/directory" \
+    -v /path/to/certs:/etc/nginx/certs \
+    -v /var/run/docker.sock:/tmp/docker.sock:ro \
+    dmp1ce/nginx-proxy-letsencrypt
+```
+
 ### Basic Authentication Support
 
 In order to be able to secure your virtual host, you have to create a file named as its equivalent VIRTUAL_HOST variable on directory

letsencrypt_service

@@ -3,6 +3,7 @@
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 seconds_to_wait=3600
+acme_ca_uri="${ACME_CA_URI:-https://acme-v01.api.letsencrypt.org/directory}"
 
 update_certs() {
     [[ ! -f "$DIR"/letsencrypt_service_data ]] && return
@@ -36,7 +37,7 @@ update_certs() {
              -f account_key.json -f key.pem -f fullchain.pem \
              $params_d_str \
              --email "${!email_varname}" \
-             --server=https://acme-v01.api.letsencrypt.org/directory \
+             --server=$acme_ca_uri \
              --default_root /usr/share/nginx/html/
 
         simp_le_return=$?