add: readme +first commit with commend explanation

README.md

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+# PTUT Virtual Environment
+
+
+## Requirements
+
+You need a consistent Linux System with the following packages :
+- `docker`
+- `make`
+- `cpp` (C pre-processor)
+
+
+## Commands
+
+In order for the environment to be launched, we need to run configuration commands, installation instructions, etc and store the final state in a **docker image**. Then we can launch several **containers** from that initial image.
+
+The building process is automated with the *Makefile* and the `make` command.
+
+---
+### 1. Build the Dockerfile
+
+```bash
+make build
+```
+
+- Creates the *Dockerfile* using the *c pre-processor* to include the files in `docker/include` in `docker/main`. The final output is located at the root of the repository in `./Dockerfile`.
+
+---
+### 2. Create the docker image
+
+```bash
+make image
+```
+
+- Creates the **docker image** from the Dockerfile. If `./Dockerfile` is missing, it will automatically launch `make build`.
+
+---
+### 3. Launch the container
+
+```bash
+make run
+```
+
+- Builds the image (*make image*)
+- Launches the container (*make run*)
+
+---
+### 4. Properly kill a container
+
+```bash
+make kill
+```
+
+- Properly kills a running container
+
+
+---
+### 5. Launch the CI loop
+
+```bash
+make boot
+```
+
+- Launches an infinite loop that
+	1. Updates the git repository (*git pull*)
+	2. Builds the image (*make image*)
+	3. Launches the container (*make run*)
+	4. When the container stops, delete it and reloop