added about and images

html/images.php

@@ -0,0 +1,39 @@
+<?php
+exec("docker images -aq", $res, $ret);
+if ($ret!=0) {
+  echo 'digraph {';
+  echo '  A [label="Error\nCannot get Docker Images"];';
+  echo '  B [label="Does the Webserver have Docker rights?"];';
+  echo '  A->B [label="Probable\nCause"];';
+  echo '}';
+  return;
+}
+exec("docker inspect ".join(" ", $res), $res2, $ret);
+if ($ret==0) {
+  $images=json_decode(join($res2), true);
+  echo "digraph {\n";
+  echo "  rankdir=TB;\n";
+
+  foreach ($images as $i) {
+    $name = "";
+    if (isset($i['RepoTags']) && count($i['RepoTags'])>0) {
+      $name = join("\\n", $i['RepoTags']);
+      if (isset($i['Author']) && $i['Author']!="") $name .= '\\n['.$i['Author'].']';
+    }
+    echo '  "'.$i['Id'].'" [label="'.$name.'"];'."\n";
+  }
+
+  foreach ($images as $i) {
+    if (isset($i['Parent']) && $i['Parent']!="")
+      echo '  "'.$i['Parent'].'" -> "'.$i['Id'].'";'."\n";
+  }
+  
+  echo "}";
+} else {
+  echo 'digraph {';
+  echo '  A [label="Error\nCannot Inspect Docker Container"];';
+  echo '}';
+  return;
+}
+
+?>