fix: remove maven-group, add docker-proxy (#120)

Author: olenagerasimova

src/main/java/com/artipie/front/ui/repository/RepositoryTemplate.java

@@ -31,7 +31,9 @@ public final class RepositoryTemplate {
     /**
      * Pre-defined template names.
      */
-    private static final List<String> PREDEFINED = List.of("maven-group", "maven-proxy");
+    private static final List<String> PREDEFINED = List.of(
+        "maven-proxy", "docker-proxy", "file-proxy", "npm-proxy", "php-proxy", "pypi-proxy"
+    );
 
     /**
      * Template engine.

src/main/resources/html/repository/create

@@ -89,7 +89,7 @@ function formSubmit() {
     <option value="npm-proxy">NPM proxy (mirror)</option>
     <option value="pypi-proxy">Python proxy (mirror)</option>
     <option value="php-proxy">Php proxy (remote)</option>
-    <option value="maven-group">Maven group (virtual)</option>
+    <option value="docker-proxy">Docker proxy (remote)</option>
   </select>
   <fieldset>
     <textarea id="new-repo-config" name="config" class="monospace" type="textarea" style="width: 100%; height: 12em;"></textarea>

src/main/resources/info/docker-proxy.info.html

@@ -0,0 +1,3 @@
+Artipie Docker Proxy repository redirects all pull requests to specified remote registries. Storage is optional here:
+if not added, no images will be cached and <code>push</code> to the repository is not allowed.
+If storage is set, remote images are cached and <code>push</code> works as usual.

src/main/resources/info/maven-group.info.html

@@ -1,9 +1,3 @@
 repo:
   type: {{type}}
   storage: default
-  permissions:
-    {{user}}:
-      - upload
-      - download
-    "*":
-      - download

src/main/resources/template/default.template.yaml

@@ -0,0 +1,7 @@
+repo:
+  type: docker-proxy
+  storage: default
+  # proxy for Docker registry
+  remotes:
+    - url: registry-1.docker.io
+    - url: mcr.microsoft.com

src/main/resources/template/docker-proxy.template.yaml

@@ -0,0 +1,6 @@
+repo:
+  type: file-proxy
+  storage: default
+  # proxy some general file storage
+  remotes:
+    - uri: https://some-general-storage.com

src/main/resources/template/file-proxy.template.yaml

@@ -1,14 +1,6 @@
 repo:
   type: maven-proxy
   storage: default
-  # proxy for Apache Maven central
+  # proxy for Apache Maven central (several remotes supported)
   remotes:
     - uri: https://repo.maven.apache.org/maven2
-      cache:
-        storage: default
-  permissions:
-    {{user}}:
-      - upload
-      - download
-    "*":
-      - download

src/main/resources/template/maven-group.template.yaml

@@ -0,0 +1,6 @@
+repo:
+  type: npm-proxy
+  storage: default
+  # proxy for NPM public registry
+  remotes:
+    - uri: https://registry.npmjs.org