Update README.md

Dockerfile

@@ -1,7 +1,5 @@
 ### Docker image for analyzing AWS S3-hosted DESI data with Jupyterlab
 
-ARG DESI_RELEASE=edr
-
 # Build from container provided by Jupyter
 # ========================================
 # https://github.com/jupyter/docker-stacks
@@ -15,6 +13,8 @@ FROM quay.io/jupyter/$STACK_BASE:$STACK_VERSION
 # Set-up environment
 # ==================
 
+ENV DESI_RELEASE=edr
+
 # Slight customization to Bash
 # https://docs.docker.com/develop/develop-images/instructions/#using-pipes
 # This fails commands even if errors occur before a pipe

README.md

@@ -108,7 +108,7 @@ sudo systemctl start docker.service
    we recommend installing [Docker engine](https://docs.docker.com/engine/install/) (the command-line tool).
    Otherwise, you should install [Docker Desktop](https://docs.docker.com/get-docker/).
 
-3. Run this line to run the image.
+2. Run this line to run the image.
 ```bash
 docker run -it -p 8888:8888 \
   --volume "$(pwd):/mnt/local_volume" \
@@ -121,3 +121,10 @@ This is not ideal for security, so if that is a major concern, then we do recomm
 
 3. Locate the line beginning with `http://127.0.0.1:8888/lab?token=...` in the output, and open the address in your browser.
    (If you are running a cloud instance, replace `127.0.0.1` with the public IP address of your cloud server.)
+
+### Updating the Docker image
+
+To update your Docker image, run
+```bash
+docker pull ghcr.io/flyorboom/docker-aws-jupyter:main
+```

welcome.ipynb

@@ -8,7 +8,8 @@
     "# Welcome!\n",
     "\n",
     "* This is the home directory **~** (`$HOME`) of this Docker container.\n",
-    "* DESI data releases are mounted at **~/desibucket**. EDR, the latest public release, is at **~/desibucket/edr** (`$DESI_ROOT`). \n",
+    "* Public DESI data releases are mounted at **~/desibucket**.\n",
+    "* EDR, the latest public release, is found in **~/desibucket/edr** (`$DESI_ROOT`).\n",
     "* Example code for analyzing the data can be found at **~/tutorials**.\n",
     "* Pipeline code for processing the data are installed at **~/desihub**.\n",
     "* For convenience, files inside **~/synced** (`$SYNCED`) are synced to the directory in which you ran this container.\n",
@@ -38,7 +39,8 @@
     "`$DESI_ROOT` is the [environment variable](https://en.wikipedia.org/wiki/Environment_variable)\n",
     "holding the path to the latest public DESI data release. \n",
     "Some code in the tutorials directly refer to the path in the NERSC servers instead.\n",
-    "You will have to replace those instances of **/global/cfs/cdirs/desi/public/<release>** with `os.environ[\"DESI_ROOT\"]`."
+    "You will have to replace those instances of **/global/cfs/cdirs/desi/public/\\<release\\>/\\<stuff\\>** ",
+    "with `os.path.expandvars(\"$DESI_ROOT/<stuff>\")`."
    ]
   },
   {