diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 3aee7fe..e768e0a 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -16,16 +16,7 @@ RUN curl https://raw.githubusercontent.com/leanprover/elan/master/elan-init.sh -
   leanc --version; \
   lake --version;
 
-WORKDIR /
+USER node
+
+WORKDIR /home/node
 RUN git clone https://github.com/leanprover-community/lean4game.git
-
-WORKDIR /lean4game
-RUN npm install
-
-# For some reason `node:node` results in 1000:1000, but user `node` has UID 30000...??
-# TODO: This alone takes 2min for me. can we refactor this so that `npm install` is already
-# run as the `node` user
-WORKDIR /
-RUN chown -R 30000:30003 /lean4game
-
-EXPOSE 3000
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index a245237..90d7155 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,18 +1,20 @@
 {
   "dockerComposeFile": "./docker-compose.yml",
   "service": "game",
-  "workspaceFolder": "/game",
+  "workspaceFolder": "/home/node/game",
   "forwardPorts": [3000],
   // These settings make sure that the created files (lake-packages etc.) are owned
   // by the user and not `root`.
   // see also https://containers.dev/implementors/json_reference/
-  // // and https://code.visualstudio.com/remote/advancedcontainers/add-nonroot-user
+  // and https://code.visualstudio.com/remote/advancedcontainers/add-nonroot-user
   "remoteUser": "node",
-  "overrideCommand": true,
   "updateRemoteUserUID": true,
-  // TODO: A problem with this setup is that the cache file is downloaded newly every time
-  // can we use the global cache storage? or already download it when creating the docker image?
-  "postAttachCommand": "(cd /game && lake update && lake exe cache get && lake build) && (cd /lean4game && npm start)",
+  // I don't know why I need this, but I did...
+  "overrideCommand": true,
+  // TODO: `lake` and `npm install` could run simultaneously using `&`
+  // the only reason I didn't do it is because the output gets mixed.
+  "postCreateCommand": "(cd ~/lean4game && npm install) && (cd ~/game && lake update && lake exe cache get && lake build)",
+  "postAttachCommand": "cd ~/lean4game && npm start",
   "customizations": {
     "vscode": {
       "settings": {
diff --git a/.devcontainer/docker-compose.yml b/.devcontainer/docker-compose.yml
index 574f0d2..3dcf40c 100644
--- a/.devcontainer/docker-compose.yml
+++ b/.devcontainer/docker-compose.yml
@@ -2,11 +2,10 @@ version: "3.9"
 
 services:
   game:
-    user: root
     build:
       context: .
       dockerfile: Dockerfile
     volumes:
-      - ..:/game
+      - ..:/home/node/game
     ports:
       - "3000:3000"