diff --git a/.gitignore b/.gitignore
index 66924b290cbf3d1ddfe012f7436884e86eebe2bd..f0cf213a01ebb4c7e5ebf7dd40366221652ce9b8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 .sw?
+.env
diff --git a/shared.yml b/shared.yml
new file mode 100644
index 0000000000000000000000000000000000000000..9ca65b84d7946c7517864d3b1ee439866d9c0557
--- /dev/null
+++ b/shared.yml
@@ -0,0 +1,11 @@
+version: "3"
+
+services:
+  sympa:
+    networks:
+      - default
+      - dolibarr_shared
+
+networks:
+  dolibar_shared:
+    external: true