diff --git a/README.md b/README.md
index fdb371e..90d6404 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,6 @@
 - [run without sudo on linux](https://docs.docker.com/engine/install/linux-postinstall/)
 
 #### docker :
-
 - [docker starter guide](https://docs.docker.com/get-started/)
 - [docker glossaire](https://docs.docker.com/glossary/)
 - [Dockerfile syntaxe](https://docs.docker.com/engine/reference/builder/)
@@ -63,8 +62,7 @@
 - [docker image from scratch](https://codeburst.io/docker-from-scratch-2a84552470c8)
 - [build context and image context](https://stackoverflow.com/questions/55108649/what-is-app-working-directory-for-a-dockerfile/55109065#55109065)
 
-	**docker pid 1**
-
+	###### docker pid 1
 	- nginx by default will create some child process (a master and some workers), then it quits (doc ?)
 	- when the first process of a docker container exit, the container exit (doc ?)
 	- so we must tell nginx to not go background : "-g 'daemon off'"
@@ -75,8 +73,7 @@
 	- "When PID 1 exits, the container will exit" (where is says in the doc ?)
 	- ["By design, containers started in detached mode exit when the root process used to run the container exits"](https://docs.docker.com/engine/reference/run/#detached--d)
 
-	**install and use docker and compose**
-
+	###### install and use docker and compose
 	- [how to install docker engine](https://docs.docker.com/engine/install/ubuntu/)
 	- [github releases](https://github.com/docker/compose/releases)
 	- [install last version of compose manually](https://docs.docker.com/compose/install/compose-plugin/#install-the-plugin-manually)
@@ -84,30 +81,29 @@
 	- [correct release version name for download with a 'v'](https://stackoverflow.com/questions/58747879/docker-compose-usr-local-bin-docker-compose-line-1-not-command-not-found)
 	- the version installed with apt is 1.17.1, way out of date
 
-		**remove old versions**
+		###### remove old versions
 		- `sudo apt remove docker docker-engine docker.io containerd runc`
 
-		**preparing directory**
+		###### preparing directory
 		- `sudo apt update`
 		- `sudo apt install ca-certificates curl gnupg lsb-release`
 		- `sudo mkdir -p /etc/apt/keyrings`
 		- `curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg`
 		- `echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null`
 
-		**installing docker engine**
+		###### installing docker engine
 		- `sudo apt update`
 		- `sudo apt install docker-ce docker-ce-cli containerd.io docker-compose-plugin`
 
-		**check if installation worked**
+		###### check if installation worked
 		- `sudo docker run hello-world`
 
-		**installing docker compose** checked version on github release, see above
+		###### installing docker compose (checked version on github release, see above)
 		- notice the 'v' below, before the version name (docker doc has it wong)
 		- `sudo curl -L "https://github.com/docker/compose/releases/download/v2.10.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose`
 		- `sudo chmod +x /usr/local/bin/docker-compose`
 
-	**volumes vs bind mounts :**
-
+	###### volumes vs bind mounts :
 	- [docker doc: use volumes](https://docs.docker.com/storage/volumes/)
 	- [docker doc: use bind mounts](https://docs.docker.com/storage/bind-mounts/)
 	- [comparison volume vs bind mounts](https://devopscook.com/docker-volumes-vs-bind-mounts/)
@@ -117,12 +113,10 @@
 	- volumes are only modifiable by docker, they don't need an absolut path, and they are not dependent of host architecture
 
 #### nginx
-
 - [nginx begginer guide](https://hub.docker.com/_/nginx/)
 - [nginx all directives for conf file](https://nginx.org/en/docs/dirindex.html)
 
 #### openssl
-
 - [openssl faq](https://www.openssl.org/docs/faq.html)
 - [openssl req man](https://www.openssl.org/docs/man1.0.2/man1/openssl-req.html)
 - [SO discussion about ssl self signed certificate and becoming a CA](https://stackoverflow.com/questions/10175812/how-to-generate-a-self-signed-ssl-certificate-using-openssl)