fix(deploy): copy from /src (helper bind) not host workspace path

scripts/deploy-via-docker.js

@@ -67,7 +67,8 @@ async function main() {
   }
   console.log('workspace source (host path):', wsSource);
 
-  const srcDist = wsSource + '/front/dist/prod';
+  // Inside the helper, the workspace is bound at /src (see Binds below).
+  const SRC_IN_HELPER = '/src/front/dist/prod';
 
   const createBody = {
     Image: HELPER_IMAGE,
@@ -82,7 +83,7 @@ async function main() {
       `set -e; ` +
         `rm -rf ${HOST_STATIC}/front && ` +
         `mkdir -p ${HOST_STATIC}/front && ` +
-        `cp -r ${srcDist}/. ${HOST_STATIC}/front/ && ` +
+        `cp -r ${SRC_IN_HELPER}/. ${HOST_STATIC}/front/ && ` +
         `echo "copied"; ls -la ${HOST_STATIC}/front | head`,
     ],
   };