feat: unify Docker entrypoint

docs/install.html

@@ -92,6 +92,7 @@
             <a href="#requirements">Requirements</a>
             <a href="#user-services">User service install</a>
             <a href="#one-line">One-line install</a>
+            <a href="#docker-beta">Docker beta install</a>
             <a href="#pi-package">Install through Pi</a>
             <a href="#manual-run">WSL / manual run</a>
             <a href="#remote-access">Remote access</a>
@@ -139,7 +140,7 @@
 
             <section id="one-line">
               <h2>One-line install</h2>
-              <p>If you prefer a curl pipe, use the repository installer:</p>
+              <p>If you prefer a curl pipe for the native user-service install, use the repository installer. This path still requires Node.js, npm, and Pi Coding Agent on the host.</p>
               <div class="code-card">
                 <div class="copy-row">
                   <strong>One-liner</strong>
@@ -149,6 +150,27 @@
               </div>
             </section>
 
+            <section id="docker-beta">
+              <h2>Docker beta install</h2>
+              <p>
+                The beta Docker runtime builds a local image and runs split <code>sessiond</code> + <code>web</code> services. It does not require
+                Node.js or npm on the host; it requires a supported Docker/Compose setup and trusted host paths.
+              </p>
+              <div class="code-card">
+                <div class="copy-row">
+                  <strong>Docker one-liner</strong>
+                  <button class="copy-button" data-copy="#docker-one-line-install">Copy</button>
+                </div>
+                <pre id="docker-one-line-install"><code><span class="prompt">$</span> curl -fsSL https://raw.githubusercontent.com/jmfederico/pi-web/main/docker/install.sh | sh</code></pre>
+              </div>
+              <p>
+                After installation, manage it with <code>~/.local/share/pi-web-docker/pi-web-docker status</code>, <code>update</code>,
+                <code>restart</code>, <code>logs</code>, and related commands. Development mode uses
+                <code>./docker/pi-web-docker --dev &lt;command&gt;</code> from a checkout.
+              </p>
+              <p><a href="https://github.com/jmfederico/pi-web/blob/main/docker/README.md">Read the Docker guide</a> for the trust model, supported host profiles, command matrix, root-safety notes, and development mode.</p>
+            </section>
+
             <section id="pi-package">
               <h2>Install through Pi</h2>
               <p>PI WEB is also published as a Pi package. This exposes a <code>/pi-web</code> command inside Pi.</p>

docs/plugins.html

@@ -262,7 +262,7 @@ After editing, check the manifest endpoint and browser-console failure cases.</c
       "title": "Start Docker",
       "group": "Docker",
       "description": "Start the local Docker Compose environment.",
-      "command": "./docker/scripts/docker-compose-dev up -d"
+      "command": "./docker/pi-web-docker --dev start"
     },
     {
       "id": "db.reset",

docs/plugins.md

@@ -227,7 +227,7 @@ Configure workspace tasks in `.pi-web/tasks.json`:
       "title": "Start Docker",
       "group": "Docker",
       "description": "Start the local Docker Compose environment.",
-      "command": "./docker/scripts/docker-compose-dev up -d"
+      "command": "./docker/pi-web-docker --dev start"
     },
     {
       "id": "db.reset",