Add Open Journal Systems (OJS) template #348 (#404)

* feat: add Open Journal Systems (OJS) template  - Add OJS 3.3.0-21 template with MariaDB database - Include custom SVG logo and proper metadata - Configure environment variables and domain setup - Fix Docker volume mount issues for proper deployment

* fix: process meta.json to resolve build validation errors

- Run npm run process-meta to sort entries alphabetically
- Remove any duplicates and ensure proper formatting
- Fixes GitHub Actions validate-meta job failure

meta.json

@@ -3674,6 +3674,24 @@
       "erp"
     ]
   },
+  {
+    "id": "ojs",
+    "name": "Open Journal Systems",
+    "version": "3.3.0-21",
+    "description": "Open Journal Systems (OJS) is a journal management and publishing system that has been developed by the Public Knowledge Project through its federally funded efforts to expand and improve access to research.",
+    "logo": "ojs.svg",
+    "links": {
+      "github": "https://github.com/pkp/docker-ojs",
+      "website": "https://pkp.sfu.ca/ojs/",
+      "docs": "https://pkp.sfu.ca/ojs/docs/"
+    },
+    "tags": [
+      "publishing",
+      "journal",
+      "research",
+      "academic"
+    ]
+  },
   {
     "id": "omni-tools",
     "name": "Omni-Tools",