Use product license terminology and license file env var

Replace "Posit license" with "product license" to match
the terminology used in the official product documentation.
Add LICENSE_FILE env var to Quick Starts so all user-editable
values are grouped at the top of each code block.

Author: bschwedler

README.md

@@ -12,7 +12,7 @@ Container images for [Posit Workbench](https://docs.posit.co/ide/server-pro).
 | [Docker](https://docs.docker.com/get-docker/) | Running containers locally | [Get Docker](https://docs.docker.com/get-docker/) |
 | [Helm](https://helm.sh/docs/intro/install/) | Deploying on Kubernetes | [Install Helm](https://helm.sh/docs/intro/install/) |
 | [kubectl](https://kubernetes.io/docs/tasks/tools/) | Deploying on Kubernetes | [Install kubectl](https://kubernetes.io/docs/tasks/tools/) |
-| Posit License | Running Posit Workbench | [Licensing FAQ](https://docs.posit.co/licensing/licensing-faq.html) |
+| Product license | Running Posit Workbench | [Licensing FAQ](https://docs.posit.co/licensing/licensing-faq.html) |
 
 ## Images
 

workbench/README.md

@@ -10,12 +10,13 @@ This container image provides [Posit Workbench](https://docs.posit.co/ide/server
 ```bash
 PWB_VERSION="2026.01.1"
 PWB_IMAGE="ghcr.io/posit-dev/workbench"  # or docker.io/posit/workbench
+PWB_LICENSE="/path/to/license.lic"
 docker run -d \
   --name workbench \
   -p 8787:8787 \
   -e PWB_TESTUSER=posit \
   -e PWB_TESTUSER_PASSWD=posit \
-  -v /path/to/license.lic:/etc/rstudio-server/license.lic \
+  -v ${PWB_LICENSE}:/etc/rstudio-server/license.lic \
   ${PWB_IMAGE}:${PWB_VERSION}
 ```
 
@@ -54,7 +55,7 @@ Tag formats:
 
 ### License Activation
 
-A valid [Posit license](https://docs.posit.co/licensing/licensing-faq.html) is required. Posit recommends license file activation. Choose one method:
+A [product license](https://docs.posit.co/licensing/licensing-faq.html) is required. Posit recommends license file activation. Choose one method:
 
 **Option 1: License File (Recommended)**
 ```bash