feat(dev): more public devcontainer fixes/enhancements

Signed-off-by: GitHub <[email protected]>

.devcontainer/Dockerfile

@@ -17,7 +17,7 @@ RUN apt-get update \
       curl \
       uuid-runtime \
     && rm -rf /var/lib/apt/lists/* \
-    && mkdir -p /usr/lib/elide \
+    && mkdir -p /usr/lib/elide /home/vscode/.elide \
     && echo "Installing Elide..." \
     && curl -sSL elide.sh | bash -s - --install-dir=/usr/lib/elide \
     && ln -s /usr/lib/elide/elide /bin/elide \

.devcontainer/README.md

@@ -1,6 +1,6 @@
 <p align="center">
   <a href="https://github.com/elide-dev">
-    <img src="https://static.elide.dev/assets/org-profile/creative/elide-banner-purple.png" alt="Elide" height=120 />
+    <img src="https://static.elide.dev/assets/org-profile/creative/elide-banner-purple.png" alt="Elide" height=240 />
   </a>
 </p>
 
@@ -10,32 +10,60 @@ This GitHub Codespace comes pre-installed with the latest version of [Elide](htt
 
 ## Stuff to try
 
-**To see available commands:**
-```
-elide --help
-```
+**Your terminal should already be open at the bottom of your screen.** We have already taken care of running the first command, `elide --help`, for you. Here's some more stuff you can try.
+
+### Basic commands
 
 **To see runtime info:**
 ```
 elide info
 ```
 
+**To verify working installation:**
+```
+elide selftest
+```
+
+### JavaScript
+
 **To run a JavaScript terminal:**
 ```
 elide shell
 ```
 
+**Encode some JSON:**
+```javascript
+JSON.stringify({x: 5})
+```
+
+**To see `.env` environment:**
+```python
+JSON.stringify(process.env)
+```
+
+**Generate a UUID:**
+```javascript
+crypto.randomUUID()+""
+```
+
+**Parse a URL and print the host:**
+```javascript
+new URL("https://google.com").host
+```
+
 **To run a JavaScript server:**
 ```
 elide serve tools/scripts/server.js
 ```
 
+### Python
+
 **To run a Python terminal:**
 ```
 elide shell --python
 ```
 
-**To verify working installation:**
-```
-elide selftest
+**To see `.env` environment:**
+```python
+import os; os.environ
 ```

.devcontainer/devcontainer.json

@@ -4,7 +4,7 @@
     "dockerfile": "Dockerfile"
   },
   "runArgs": ["--init", "--privileged"],
-  "postAttachCommand": "code .devcontainer/README.md && elide --help",
+  "postAttachCommand": "echo 'ELIDE_CODESPACE=true' > .env && touch package.json && code .devcontainer/README.md && clear && elide --help",
   "overrideCommand": false,
   "features": {
     "ghcr.io/devcontainers/features/git:1": {},