docs: complete/modify readme

README.md

@@ -26,25 +26,35 @@ Configuring GOAC is straightforward. You need to create a `.goacproject.yaml` fi
 ```yaml
 # .goacproject.yaml
 
-version: 1.0       # Please do not change this, keep it at 1.0
-name: goac         # The name of your project/service/application
-target:            # Currently, GOAC supports two targets: build, build-image
-  build:           # Create the Go binary
+version: 1.0      # Please do not modify this value; keep it set to 1.0
+name: goac        # Specify the name of your project, service, or application here
+target:           # GOAC currently supports two targets: 'build' and 'build-image'
+  build:          # This target compiles the Go binary
     exec:
-      cmd: go      # The command to execute for compilation, 'go' in this case
-      params:      # Parameters to add, the path and filename are automatically appended, the final command here will be: go build -ldflags="-s -w" -o . goac
+      cmd: go     # The command to execute for compilation; 'go' in this case
+      params:     # Parameters to be added; the final command will be: go build -ldflags="-s -w" -o ./goac goac
         - build
         - -ldflags=-s -w
         - -o
-  build-image:
+        - "{{project-path}}/{{project-name}}"
+        - "{{project-path}}"
+  build-image:    # This target builds the Docker image
+    envs:
+      - key: PROJECT_PATH
+        value: "{{project-path}}"
     exec:
-      cmd: docker
-      params:
-        - buildx
-        - build
-        - --platform=linux/amd64,linux/arm64
-        - --network
-        - host
+      cmd: ./_scripts/build-image.sh # Shell script to execute for building the image
+```
+
+To see what the script that builds the image of this project looks like, take a look at this example: [build-image.sh](./_scripts/build-image.sh)
+
+### Variables
+The configuration file interprets variables that will automatically be replaced by their values.
+
+Currently, there are two:
+```
+{{project-name}} # The name of the project
+{{project-path}} # The path of the project
 ```
 
 ### Environnement