docs: replace enterprise-base image references with example-base (#27025)

Follow-up to #27018, sweeping the remaining
`codercom/enterprise-base:ubuntu` references to
`codercom/example-base:ubuntu` and `coder/enterprise-images` links to
[coder/images](https://github.com/coder/images). The `example-` prefix
is the recommended one for new deployments per the coder/images README.

Covers the 11 docs pages flagged by doc-check on #27018 plus the
embedded `examples/templates/docker` and `examples/templates/kubernetes`
starter templates (image string only; the `image` variable lives in the
coder/registry templates, see coder/registry#943).

OpenShift imagestream names in `docs/install/openshift.md` keep the
`enterprise-base` local name; only the upstream image reference changed.

Part of DEVREL-201.

🤖 Generated with Coder Agents using Claude, on behalf of @bpmct

docs/admin/templates/extending-templates/docker-in-workspaces.md

@@ -27,7 +27,7 @@ the Coder host, modify your template to use the sysbox-runc runtime:
 resource "docker_container" "workspace" {
   # ...
   name    = "coder-${data.coder_workspace.me.owner}-${lower(data.coder_workspace.me.name)}"
-  image   = "codercom/enterprise-base:ubuntu"
+  image   = "codercom/example-base:ubuntu"
   env     = ["CODER_AGENT_TOKEN=${coder_agent.main.token}"]
   command = ["sh", "-c", coder_agent.main.init_script]
   # Use the Sysbox container runtime (required)
@@ -105,7 +105,7 @@ resource "kubernetes_pod" "dev" {
         name  = "CODER_AGENT_TOKEN"
         value = coder_agent.main.token
       }
-      image = "codercom/enterprise-base:ubuntu"
+      image = "codercom/example-base:ubuntu"
       command = ["sh", "-c", coder_agent.main.init_script]
     }
   }
@@ -333,7 +333,7 @@ resource "docker_container" "dind" {
 
 resource "docker_container" "workspace" {
   count   = data.coder_workspace.me.start_count
-  image   = "codercom/enterprise-base:ubuntu"
+  image   = "codercom/example-base:ubuntu"
   name    = "dev-${data.coder_workspace.me.id}"
   command = ["sh", "-c", coder_agent.main.init_script]
   env = [
@@ -391,7 +391,7 @@ resource "kubernetes_pod" "main" {
     }
     container {
       name    = "dev"
-      image   = "codercom/enterprise-base:ubuntu"
+      image   = "codercom/example-base:ubuntu"
       command = ["sh", "-c", coder_agent.main.init_script]
       security_context {
         run_as_user = "1000"
@@ -472,7 +472,7 @@ resource "kubernetes_pod" "dev" {
         name  = "CODER_AGENT_TOKEN"
         value = coder_agent.main.token
       }
-      image = "codercom/enterprise-base:ubuntu"
+      image = "codercom/example-base:ubuntu"
       command = ["sh", "-c", <<EOF
     # Start the Coder agent as the "coder" user
     # once systemd has started up

docs/admin/templates/extending-templates/jetbrains-preinstall.md

@@ -74,7 +74,7 @@ resource "coder_agent" "main" {
 If you are using Docker based workspaces, you can add the command to your Dockerfile:
 
 ```dockerfile
-FROM codercom/enterprise-base:ubuntu
+FROM codercom/example-base:ubuntu
 
 # JetBrains IDE installation (configurable)
 ARG IDE_CODE=IU

docs/admin/templates/extending-templates/process-priority.md

@@ -71,7 +71,7 @@ resource "kubernetes_deployment" "workspace" {
       spec {
         container {
           name  = "dev"
-          image = "codercom/enterprise-base:ubuntu"
+          image = "codercom/example-base:ubuntu"
 
           env {
             name  = "CODER_AGENT_TOKEN"

docs/admin/templates/extending-templates/web-ides.md

@@ -58,7 +58,7 @@ container image. Here's a Dockerfile which leverages some special
 [code-server features](https://coder.com/docs/code-server):
 
 ```dockerfile
-FROM codercom/enterprise-base:ubuntu
+FROM codercom/example-base:ubuntu
 
 # install the latest version
 USER root

docs/admin/templates/startup-coordination/example.md

@@ -88,7 +88,7 @@ data "coder_workspace_owner" "me" {}
 
 resource "docker_container" "workspace" {
   count = data.coder_workspace.me.start_count
-  image = "codercom/enterprise-base:ubuntu"
+  image = "codercom/example-base:ubuntu"
   name = "coder-${data.coder_workspace_owner.me.name}-${lower(data.coder_workspace.me.name)}"
   entrypoint = ["sh", "-c", coder_agent.main.init_script]
   env        = [
@@ -146,7 +146,7 @@ data "coder_workspace_owner" "me" {}
 
 resource "docker_container" "workspace" {
   count = data.coder_workspace.me.start_count
-  image = "codercom/enterprise-base:ubuntu"
+  image = "codercom/example-base:ubuntu"
   name = "coder-${data.coder_workspace_owner.me.name}-${lower(data.coder_workspace.me.name)}"
   entrypoint = ["sh", "-c", coder_agent.main.init_script]
   env        = [