diff --git a/01-docker/01-docker/EXERCISE-01.md b/01-docker/01-docker/EXERCISE-01.md
index ad911b3..497e390 100644
--- a/01-docker/01-docker/EXERCISE-01.md
+++ b/01-docker/01-docker/EXERCISE-01.md
@@ -57,7 +57,7 @@ EXPOSE 80
 
 Notes about the _Dockerfile_ (refer to the [Dockerfile reference](https://docs.docker.com/reference/builder/)) for more details):
 
-- `FROM` specifies the base image to build our image upon (_node:10.11.0-alpine_ contains the NodeJS runtime)
+- `FROM` specifies the base image to build our image upon (_node:15.4.0-alpine_ contains the NodeJS runtime)
 - `COPY` simply copies a file from the host file system to the image filesystem
 - `EXPOSE` identifies the network ports the container will listen on
 - `CMD` specifies the executable to run when a container is started from the image (we are using the _exec_ form)
diff --git a/01-docker/01-docker/solution/Dockerfile b/01-docker/01-docker/solution/Dockerfile
index 2c44fe4..d63a8d6 100644
--- a/01-docker/01-docker/solution/Dockerfile
+++ b/01-docker/01-docker/solution/Dockerfile
@@ -1,6 +1,10 @@
-FROM node:10.11.0-alpine
-RUN npm install express redis
+FROM node:15.4.0-alpine
+
 COPY files/ /files/
-COPY webui.js /
+COPY webui.js /files/webui.js
+
+WORKDIR /files
+RUN npm install express redis
+
 CMD ["node", "webui.js"]
 EXPOSE 80