Add astropy installation comment and env var setting instruction

Author: jaladh-singhal

docs/usage/charting.ipynb

@@ -21,7 +21,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": null,
    "id": "d26d722f",
    "metadata": {},
    "outputs": [
@@ -40,7 +40,7 @@
     "from firefly_client import FireflyClient\n",
     "\n",
     "# Initialize a FireflyClient instance\n",
-    "fc = FireflyClient.make_client(url=\"http://localhost:8080/firefly\")\n",
+    "fc = FireflyClient.make_client(url=\"https://irsa.ipac.caltech.edu/irsaviewer\")\n",
     "\n",
     "# Display a catalog table (from URL of 2MASS TAP query for M51)\n",
     "table_url = \"http://irsa.ipac.caltech.edu/TAP/sync?FORMAT=IPAC_TABLE&QUERY=SELECT+*+FROM+fp_psc+WHERE+CONTAINS(POINT('J2000',ra,dec),CIRCLE('J2000',202.4841667,47.23055556,0.125))=1\"\n",

docs/usage/displaying-images.ipynb

@@ -29,6 +29,17 @@
     "First, we create a `FireflyClient` instance and open a Firefly viewer. See [Initializing a FireflyClient instance](./initializing-vanilla.html) for more details."
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "42fb0b65",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Uncomment the next line to install dependencies if needed.\n",
+    "# !pip install firefly-client astropy"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,

docs/usage/initializing-vanilla.ipynb

@@ -18,6 +18,8 @@
     "    - IRSA Viewer at https://irsa.ipac.caltech.edu/irsaviewer\n",
     "    - Rubin Science Platform Portal at https://data.lsst.cloud/portal/app/ (requires authentication; the `ACCESS_TOKEN` environment variable must be set)\n",
     "\n",
+    "For example, in a bash/zsh shell, enter `export FIREFLY_URL=\"https://irsa.ipac.caltech.edu/irsaviewer\"` before launching the notebook via `jupyter lab` or `jupyter notebook` command.\n",
+    "\n",
     "If `FIREFLY_URL` is not defined, the default server URL is `http://localhost:8080/firefly`, which is often used for a Firefly server running locally.\n",
     "\n",
     ".. note::\n",
@@ -33,6 +35,17 @@
     "The only required import here is `FireflyClient`."
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "4b61ec8f",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Uncomment the next line if you have not installed the firefly-client package already.\n",
+    "# !pip install firefly-client"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,

docs/usage/viewing-tables.ipynb

@@ -19,6 +19,17 @@
     "First, we create a `FireflyClient` instance and open a Firefly viewer. See [Initializing a FireflyClient instance](./initializing-vanilla.html) for more details. Then, we display a FITS image from a URL so that we have an image for catalog overlays. See [Displaying a FITS Image](./displaying-fits-image.html) for more details."
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "cad23c03",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Uncomment the next line to install dependencies if needed.\n",
+    "# !pip install firefly-client astropy"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,