Add Owncast blueprint and metadata (#369)

* Add Owncast blueprint and metadata

Introduces a new Owncast blueprint with docker-compose configuration, template, and image. Updates meta.json to register Owncast with relevant metadata and links.

* Rename owncast image from JPG to PNG

Renamed the owncast blueprint image file extension from .jpg to .png for consistency or format requirements. No changes to image content.

blueprints/owncast/docker-compose.yml

@@ -0,0 +1,15 @@
+
+version: "3.8"
+
+services:
+  owncast:
+    image: owncast/owncast:latest
+    restart: unless-stopped
+    volumes:
+      - owncast-data:/app/data
+    ports:
+      - 8080
+      - 1935
+
+volumes:
+  owncast-data: {}

blueprints/owncast/template.toml

@@ -0,0 +1,12 @@
+[variables]
+main_domain = "${domain}"
+
+[config]
+[[config.domains]]
+serviceName = "owncast"
+port = 8080
+host = "${main_domain}"
+
+[config.env]
+
+[[config.mounts]]

meta.json

@@ -3654,6 +3654,26 @@
       "self-hosted"
     ]
   },
+  {
+    "id": "owncast",
+    "name": "Owncast",
+    "version": "latest",
+    "description": "Owncast is a self-hosted live video streaming and chat server for use with existing broadcasting software.",
+    "logo": "owncast.png",
+    "links": {
+      "github": "https://github.com/owncast/owncast",
+      "website": "https://owncast.online/",
+      "docs": "https://owncast.online/docs/"
+    },
+    "tags": [
+      "streaming",
+      "live-video",
+      "chat",
+      "broadcasting",
+      "self-hosted",
+      "rtmp"
+    ]
+  },
   {
     "id": "palmr",
     "name": "Palmr",