Allow let's encrypte sertificates (#300)

* Allow let's encrypte sertificates

Co-authored-by: papacarlo <builder@onlyoffice.com>
Co-authored-by: Roman <demidov.roman@onlyoffice.com>

Dockerfile

@@ -15,6 +15,7 @@ RUN echo "#!/bin/sh\nexit 0" > /usr/sbin/policy-rc.d && \
         adduser \
         apt-utils \
         bomstrip \
+        certbot \
         htop \
         libasound2 \
         libboost-regex-dev \

README.md

@@ -99,7 +99,14 @@ So you need to create and install the following files:
         /app/onlyoffice/DocumentServer/data/certs/tls.key
         /app/onlyoffice/DocumentServer/data/certs/tls.crt
 
-When using CA certified certificates, these files are provided to you by the CA. When using self-signed certificates you need to generate these files yourself. Skip the following section if you have CA certified SSL certificates (e.g. [Let's Encrypt](https://letsencrypt.org)).
+When using CA certified certificates (e.g [Let's encrypt](https://letsencrypt.org)), these files are provided to you by the CA. If you are using self-signed certificates you need to generate these files [yourself](#generation-of-self-signed-certificates).
+
+#### Using the automatically generated Let's Encrypt SSL Certificates
+
+        sudo docker run -i -t -d -p 443:443 \
+        -e LETS_ENCRYPT_DOMAIN=your_domain -e LETS_ENCRYPT_MAIL=your_mail  onlyoffice/documentserver
+
+If you want to get and extend Let's Encrypt SSL Certificates automatically just set LETS_ENCRYPT_DOMAIN and LETS_ENCRYPT_MAIL variables.
 
 #### Generation of Self Signed Certificates
 
@@ -186,6 +193,8 @@ Below is the complete list of parameters that can be set using environment varia
 - **METRICS_HOST**: Defines StatsD listening host. Defaults to `localhost`.
 - **METRICS_PORT**: Defines StatsD listening port. Defaults to `8125`.
 - **METRICS_PREFIX**: Defines StatsD metrics prefix for backend services. Defaults to `ds.`.
+- **LETS_ENCRYPT_DOMAIN**: Defines the domain for Let's Encrypt certificate.
+- **LETS_ENCRYPT_MAIL**: Defines the domain administator mail address for Let's Encrypt certificate.
 
 ## Installing ONLYOFFICE Document Server integrated with Community and Mail Servers
 

run-document-server.sh

@@ -82,6 +82,12 @@ PG_NEW_CLUSTER=false
 RABBITMQ_DATA=/var/lib/rabbitmq
 REDIS_DATA=/var/lib/redis
 
+if [ ${LETS_ENCRYPT_DOMAIN} != "" -a ${LETS_ENCRYPT_MAIL} != "" ]; then
+  LETSENCRYPT_ROOT_DIR="/etc/letsencrypt/live"
+  SSL_CERTIFICATE_PATH=${LETSENCRYPT_ROOT_DIR}/${LETS_ENCRYPT_DOMAIN}/fullchain.pem
+  SSL_KEY_PATH=${LETSENCRYPT_ROOT_DIR}/${LETS_ENCRYPT_DOMAIN}/privkey.pem
+fi
+
 read_setting(){
   deprecated_var POSTGRESQL_SERVER_HOST DB_HOST
   deprecated_var POSTGRESQL_SERVER_PORT DB_PORT
@@ -544,6 +550,12 @@ fi
 # it run in all cases.
 service nginx start
 
+if [ ${LETS_ENCRYPT_DOMAIN} != "" -a ${LETS_ENCRYPT_MAIL} != "" ]; then
+  if [ ! -f "${SSL_CERTIFICATE_PATH}" -a ! -f "${SSL_KEY_PATH}" ]; then
+    documentserver-letsencrypt.sh ${LETS_ENCRYPT_MAIL} ${LETS_ENCRYPT_DOMAIN}
+  fi
+fi
+
 # Regenerate the fonts list and the fonts thumbnails
 if [ "${GENERATE_FONTS}" == "true" ]; then
   documentserver-generate-allfonts.sh ${ONLYOFFICE_DATA_CONTAINER}