diff --git a/production/docker/docker-compose.yml b/production/docker/docker-compose.yml
index c695df9..104e7ad 100644
--- a/production/docker/docker-compose.yml
+++ b/production/docker/docker-compose.yml
@@ -49,6 +49,7 @@ services:
 
   memo-client:
     build: ./memo-client
+    image: memo-client
     container_name: memo-client
     logging:
       driver: json-file
diff --git a/production/docker/memo-client/.env-example b/production/docker/memo-client/.env-example
new file mode 100644
index 0000000..9a9f5a2
--- /dev/null
+++ b/production/docker/memo-client/.env-example
@@ -0,0 +1,9 @@
+# psf-memo-db REST API base URL (no trailing slash).
+# Baked into the SPA when the memo-client image is built.
+# Example: https://api.mydomain.com
+#
+# Usage:
+#   cp .env-example .env
+#   # edit REACT_APP_MEMO_DB_URL
+#   docker compose build memo-client
+REACT_APP_MEMO_DB_URL=http://localhost:5021
diff --git a/production/docker/memo-client/Dockerfile b/production/docker/memo-client/Dockerfile
index db201ea..80d31db 100644
--- a/production/docker/memo-client/Dockerfile
+++ b/production/docker/memo-client/Dockerfile
@@ -30,6 +30,10 @@ WORKDIR /home/safeuser/psf-memo-client
 # Install dependencies
 RUN npm install
 
+# Create React App reads REACT_APP_* from this .env at build time.
+# Edit production/docker/memo-client/.env before building.
+COPY .env .env
+
 # Build the site
 RUN npm run build