Update docker configuration for exercises (#3907)

* Get exercises working in docker

    - Add new compose file for exercises
    - Update dockerfile to use debian bookworm and node 12
    - Listen on 0.0.0.0 instead of localhost

* Add additional clarity to troubleshooting steps

Dockerfile

@@ -1,14 +1,25 @@
-FROM node:10.9-slim as builder
+FROM debian:bookworm-slim as base
 
 RUN apt-get update && apt-get install -y \
     build-essential \
     g++ \
     gcc \
     git \
-    python2.7 \
+    curl \
   && rm -rf /var/lib/apt/lists/*
 
-RUN ln -s /usr/bin/python2.7 /usr/bin/python2
+FROM base as builder
+ENV NODE_VERSION=12.22.12
+ENV NVM_DIR="/root/.nvm"
+RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash \
+  && . $NVM_DIR/nvm.sh \
+  && nvm install $NODE_VERSION \
+  && nvm alias default $NODE_VERSION \
+  && nvm use default \
+  && npm install -g yarn
+
+ENV NODE_PATH=$NVM_DIR/versions/node/v$NODE_VERSION/lib/node_modules
+ENV PATH=$NVM_DIR/versions/node/v$NODE_VERSION/bin:$PATH
 
 FROM builder as build
 ARG PUBLIC_PATH

docker-compose.exercises.yml

@@ -0,0 +1,14 @@
+version: '3.5'
+services:
+  build:
+    command: bash -c "if [ -z \"`ls -A node_modules`\" ]; then yarn; fi && yarn serve exercises"
+    build:
+      context: .
+      target: builder
+    working_dir: /code
+    environment:
+      - "OX_PROJECT_HOST=0.0.0.0"
+    volumes:
+      - .:/code:cached
+    ports:
+      - "8001:8001"

docker-compose.override.yml

@@ -6,6 +6,8 @@ services:
       context: .
       target: builder
     working_dir: /code
+    environment:
+      - "OX_PROJECT_HOST=0.0.0.0"
     volumes:
       - .:/code:cached
     ports:

docker-quickstart.md

@@ -26,6 +26,8 @@ the js files will be served at `http://localhost:8000`
 
 the ui is available through the tutor-server project at `http://localhost:3001`
 
+Something seem broken? See [Troubleshooting](#troubleshooting)
+
 ## Run Exercises frontend
 
 ``` bash
@@ -36,6 +38,8 @@ the js files will be served at `http://localhost:8001`
 
 You will need to start the exercises backend independently
 
+Something seem broken? See [Troubleshooting](#troubleshooting)
+
 ## node_modules
 
 if you need to update node modules run:
@@ -53,5 +57,5 @@ docker-compose exec build <command>
 ## Troubleshooting
 
 if you run into problems, try the following:
-* rebuilding the build image with `docker-compose build`
-* remove your node_modules directory
+* rebuilding the build image with `docker-compose build` or `docker-compose -f <compose-file> build` (depending on your use case)
+* remove your node_modules directory

webpack.config.js

@@ -112,7 +112,7 @@ const config = {
         quiet: false,
         noInfo: false,
         clientLogLevel: 'warning',
-        host: 'localhost',
+        host,
         filename: '[name].js',
         hot: !isCI,
         liveReload: !isCI,