Capture mesh-catalog at feat/r4g (2246ccc4) with the templates its manifests name and its predefined.json, and lay the copy out as a repository's root

The catalogue's manifests moved their content into template files and fall back to predefined keys, so a copy of
module.json alone no longer passes the catalogue's own check; the bus's Dockerfile is gone from the catalogue.

testdata/beside/mesh-catalog/modules/nextcloud/module.json.captured

@@ -5,7 +5,8 @@
   "requires": [
     "postgres-database",
     "s3-bucket",
-    "route"
+    "route",
+    "document-server"
   ],
   "contributes": {
     "postgres-database": {
@@ -19,11 +20,13 @@
   "binds": {
     "postgres-database": "${dir:state}/database.json",
     "s3-bucket": "${dir:state}/store.json",
-    "route": "${dir:state}/route.json"
+    "route": "${dir:state}/route.json",
+    "document-server": "${dir:state}/document-server.json"
   },
   "secrets": {
     "postgres-database": "${dir:state}/database.secret",
-    "s3-bucket": "${dir:state}/store.secret"
+    "s3-bucket": "${dir:state}/store.secret",
+    "document-server": "${dir:state}/document-server.secret"
   },
   "emits": [
     "user.created",
@@ -54,35 +57,66 @@
       }
     ]
   },
+  "config": {
+    "container": {
+      "type": "string",
+      "description": "The name of the container the module's tools run Nextcloud's occ in; empty is nextcloud.",
+      "trusted": true,
+      "default": ""
+    },
+    "url": {
+      "type": "string",
+      "description": "The address the module's tools reach Nextcloud's sharing API at, as a URL; empty is this machine's Nextcloud on its port.",
+      "trusted": true,
+      "default": ""
+    },
+    "user": {
+      "type": "string",
+      "description": "The Nextcloud account the module's tools act as; empty is admin.",
+      "trusted": true,
+      "default": ""
+    }
+  },
   "resources": [
     {
       "id": "mesh-state",
       "type": "directory",
       "mode": "0700",
-      "place": "mesh"
+      "place": "mesh",
+      "unknown": "program"
     },
     {
       "id": "state",
       "type": "directory",
       "mode": "0700",
-      "place": "."
+      "place": ".",
+      "unknown": "program"
     },
     {
       "id": "server-env",
       "type": "file",
       "path": "${dir:state}/server.env",
       "mode": "0600",
-      "content": "POSTGRES_HOST=${bound:postgres-database:at}:${bound:postgres-database:port}\nPOSTGRES_DB=${bound:postgres-database:as}\nPOSTGRES_USER=${bound:postgres-database:as}\nPOSTGRES_PASSWORD=${secret:postgres-database}\nNEXTCLOUD_ADMIN_USER=mesh-admin\nNEXTCLOUD_ADMIN_PASSWORD=${secret:admin}\nOBJECTSTORE_S3_HOST=${bound:s3-bucket:at}\nOBJECTSTORE_S3_PORT=${bound:s3-bucket:port}\nOBJECTSTORE_S3_BUCKET=${bound:s3-bucket:bucket}\nOBJECTSTORE_S3_KEY=${bound:s3-bucket:as}\nOBJECTSTORE_S3_SECRET=${secret:s3-bucket}\nOBJECTSTORE_S3_SSL=false\nOBJECTSTORE_S3_USEPATH_STYLE=true\nOBJECTSTORE_S3_REGION=${bound:s3-bucket:region}\n"
+      "template": "files/server.env"
     },
     {
       "id": "html",
       "type": "directory",
       "mode": "0750",
-      "owner": "33:33"
+      "owner": "33:33",
+      "unknown": "program"
     },
     {
       "id": "server",
       "type": "container",
+      "health": {
+        "kind": "http",
+        "endpoint": "web",
+        "path": "/status.php",
+        "status": 200,
+        "body": "\"installed\":true",
+        "needs": "postgres-database"
+      },
       "name": "nextcloud",
       "image": "nextcloud@sha256:fb966733647ea03f0446b0c22eac9733c8eb616d37b960caca9d4c3010e14a08",
       "env-file": [
@@ -101,7 +135,9 @@
       "type": "file",
       "path": "${dir:mesh-state}/config.json",
       "mode": "0600",
-      "content": "{}\n",
+      "template": "files/config.json",
+      "takes-config": ["container", "url", "user"],
+      "protected": ["onlyofficeSecret"],
       "merge": "json"
     }
   ],
@@ -125,6 +161,11 @@
           "MESH_NEXTCLOUD_ADMIN_USER": "mesh-admin",
           "MESH_NEXTCLOUD_ADMIN_PASSWORD_FILE": "${dir:state}/admin.secret"
         }
+      },
+      {
+        "name": "files",
+        "kind": "archive",
+        "from": "files"
       }
     ]
   }