Add blueprints for Adminer, Affine Pro, and AllTube with Docker Compose and metadata

- Added Adminer entry in meta.json with detailed description, logo, and relevant links.
- Introduced Docker Compose configurations for Adminer, Affine Pro, and AllTube services.
- Created template.toml files for each service with default variables for configuration.

blueprints/alltube/template.toml

@@ -0,0 +1,18 @@
+[variables]
+main_domain = "${domain}"
+title = "My AllTube Site"
+convert = "true"
+stream = "true"
+remux = "true"
+
+[config]
+[[config.domains]]
+serviceName = "alltube"
+port = 80
+host = "${main_domain}"
+
+[config.env]
+TITLE = "${title}"
+CONVERT = "${convert}"
+STREAM = "${stream}"
+REMUX = "${remux}"