update steps

INSTALLATION.md

@@ -1,14 +1,15 @@
 # Installing Databunker
 
-## From Docker container
+## Just run from the Docker container
 
-The easiest method is to start docker container. Always use the latest version.
+This is the easiest method to start with Data Bunker. Always use the latest version.
 
 You can fetch and start Databunker with the following command:
 
 ```
-mkdir -p /tmp/data
-docker run -v /tmp/data:/databunker/data -p 3000:3000 \
+cd ~
+mkdir -p data
+docker run -v ~/data:/databunker/data -p 3000:3000 \
   --rm --name dbunker paranoidguy/databunker
 ```
 
@@ -45,11 +46,14 @@ docker run -p 3000:3000 -v /tmp/data:/databunker/data \
 
 You can generate SSL certificates and place them in the /databunker/certs directory in the running container.
 
-For example you can do this by mounting **/databunker/certs** to a local **certs/** directory as:
+For example you can do this by mounting **/databunker/certs** to a local **~/certs/** directory as:
 
 ```
-docker run -p 3000:3000 -v /tmp/data:/databunker/data \
-  -v certs:/databunker/certs \
+cd ~
+mkdir -p certs
+# generate certificates, check bellow
+docker run -p 3000:3000 -v ~/data:/databunker/data \
+  -v ~/certs:/databunker/certs \
   -e "DATABUNKER_MASTERKEY=**DATABUNKER_MASTERKEY**" \
   --rm --name dbunker paranoidguy/databunker
 
@@ -62,11 +66,20 @@ So, you need to prepare server.crt and server.key files.
 You can do the following command to generate one:
 
 ```
+cd ~
+mkdir -p certs
+cd certs
 openssl req -new -newkey rsa:4096 -days 365 -nodes -x509 \
     -subj "/C=UK/ST=/L=London/O=Your-company Ltd./CN=databunker.your-company.com" \
     -keyout server.key -out server.crt
 ```
 
+## Use certificates generated by letsencrypt
+
+Copy letsencrypt file **privkey.pem** to ~/certs/server.key
+
+Copy letsencrypt file **fullchain.pem** file to ~/certs/server.crt
+
 
 # Create a test record