set telemetry post frontend build in standalone docker img

frontend/scripts/replace-standalone-build-variable.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+ORIGINAL=$1
+REPLACEMENT=$2
+
+if [ "${ORIGINAL}" = "${REPLACEMENT}" ]; then
+    echo "Environment variable replacement is the same, skipping.."
+    exit 0
+fi
+
+echo "Replacing pre-baked value.."
+
+find public .next -type f -name "*.js" |
+while read file; do
+    sed -i "s|$ORIGINAL|$REPLACEMENT|g" "$file"
+done