Canvas: Use volume to persist data

Change-Id: Ia93299590885c91d6e44c1e8842ba2c259bfc8a0
diff --git a/apps/canvas/back/.env b/apps/canvas/back/.env
new file mode 100644
index 0000000..5173186
--- /dev/null
+++ b/apps/canvas/back/.env
@@ -0,0 +1,3 @@
+DATABASE_URL=file:${DODO_VOLUME_DATA}/dodo.db
+PUBLIC_ADDR=https://canvas.v1.dodo.cloud
+INTERNAL_API_ADDR=http://canvas.hgrz-dodo-app-gry.svc.cluster.local:8081
\ No newline at end of file