feat: self-hosted Docker image with Gitea Actions and Unraid docs

- Dockerfile: replace s6overlay with multi-stage build (golang:1.22-alpine
  builder + alpine:3.19 runtime), compiles from source, no goreleaser needed
- docker/entrypoint.sh: PUID/PGID support via su-exec
- .gitea/workflows/docker.yml: auto-build and push to Gitea container
  registry on every master commit (linux/amd64 + linux/arm64)
- README: add tmdb api_key docs, update Docker section to point to
  forge.dilain.com registry, add Unraid setup section

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -55,26 +55,30 @@ media:
     api_key: omdb-api-key
   tvdb:
     api_key: tvdb-legacy-api-key
+  tmdb:
+    api_key: tmdb-api-key
 ```
 
 An omdb `api_key` can be provided which will be used to supplement trakt data with additional information such as:
 
-- Metascore     
+- Metascore
 - RottenTomatoes
-- ImdbRating    
-- ImdbVotes     
-- Language      
+- ImdbRating
+- ImdbVotes
+- Language
 - Country
 
 An tvdb `api_key` can be provided which will be used to supplement trakt data with additional information such as:
 
-- Runtime        
-- Language       
-- Genre          
-- AirsDayOfWeek  
-- SiteRating     
+- Runtime
+- Language
+- Genre
+- AirsDayOfWeek
+- SiteRating
 - SiteRatingCount
 
+A tmdb `api_key` can be provided to enable automatic enrichment of RSS feed items that carry no media ID. When an item has no tvdb/imdb/tmdb ID, Nabarr will parse the release title, extract a clean title and year, then search TMDB to resolve a TMDB ID before processing. Get a free API key at [themoviedb.org](https://www.themoviedb.org/settings/api).
+
 
 ### PVR
 
@@ -139,11 +143,11 @@ rss:
         - sonarr
 ```
 
-In order for Nabarr to be-able to process items in these feeds, a tvdb and/or imdb id must be present in the feed items.
+In order for Nabarr to process items in these feeds, a tvdb, imdb or tmdb id must be present in the feed items. If no ID is found but a `tmdb.api_key` is configured, Nabarr will attempt to resolve the ID automatically from the release title.
 
 If there is a tvdb id present, it is assumed that the feed item relates to a TV Series and thus, the item will propagate to any Sonarr PVR specified.
 
-If there is a imdb id present, it is assumed that the feed item relates to a Movie and thus, the item will propagate to any Radarr PVR specified.
+If there is a imdb or tmdb id present, it is assumed that the feed item relates to a Movie and thus, the item will propagate to any Radarr PVR specified.
 
 ### Full config file
 
@@ -224,12 +228,18 @@ rss:
 
 ### Docker
 
-Nabarr's Docker image provides various versions that are available via tags. The `latest` tag usually provides the latest stable version. Others are considered under development and caution must be exercised when using them.
+The Docker image is built automatically from this repository and pushed to the Gitea container registry on every commit to `master`.
 
 | Tag | Description |
 | :----: | --- |
-| latest | Latest stable version from a tagged GitHub release |
-| master | Most recent GitHub master commit |
+| `latest` | Most recent master commit |
+| `master` | Most recent master commit |
+
+#### Build locale
+
+```bash
+docker build -t nabarr -f docker/Dockerfile .
+```
 
 #### Usage
 
@@ -237,41 +247,57 @@ Nabarr's Docker image provides various versions that are available via tags. The
 docker run \
   --name=nabarr \
   -e "PUID=1000" \
-  -e "PGID=1001" \
+  -e "PGID=1000" \
   -v "/opt/nabarr:/config" \
   --restart=unless-stopped \
-  -d cloudb0x/nabarr:latest
+  -d forge.dilain.com/laurent/nabarr:latest
 ```
 
 #### Parameters
 
-Nabarr's Docker image supports the following parameters.
-
 | Parameter | Function |
 | :----: | --- |
-| `-e PUID=1000` | The UserID to run the Nabarr binary as |
-| `-e PGID=1000` | The GroupID to run the Nabarr binary as |
-| `-e APP_VERBOSITY=0` | The Nabarr logging verbosity level to use. (0 = info, 1 = debug, 2 = trace) |
-| `-v /config` | Nabarr's config |
+| `-e PUID=1000` | UserID to run Nabarr as |
+| `-e PGID=1000` | GroupID to run Nabarr as |
+| `-e APP_VERBOSITY=0` | Log verbosity (0 = info, 1 = debug, 2 = trace) |
+| `-v /config` | Config, cache and log directory |
 
-#### Cloudbox
+### Unraid
 
-The following Docker setup should work for many Cloudbox users.
+#### Ajouter le registre privé
 
-**WARNING: You still need to configure the `config.yml` file!**
+Dans **Settings → Docker → Registry URL**, ajouter :
 
-```bash
-docker run \
-  --name=nabarr \
-  -e "PUID=1000" \
-  -e "PGID=1001" \
-  -v "/opt/nabarr:/config" \
-  --label="com.github.cloudbox.cloudbox_managed=true" \
-  --network=cloudbox \
-  --network-alias=nabarr  \
-  --restart=unless-stopped \
-  -d cloudb0x/nabarr:latest
 ```
+https://forge.dilain.com
+```
+
+#### Ajouter le conteneur manuellement
+
+Dans l'onglet **Docker**, cliquer sur **Add Container** et renseigner :
+
+| Champ | Valeur |
+| --- | --- |
+| Name | `nabarr` |
+| Repository | `forge.dilain.com/laurent/nabarr:latest` |
+| Network Type | `bridge` |
+| Restart | `unless-stopped` |
+
+Ajouter les variables d'environnement :
+
+| Variable | Valeur par défaut | Description |
+| --- | --- | --- |
+| `PUID` | `99` | UserID (nobody sur Unraid) |
+| `PGID` | `100` | GroupID (users sur Unraid) |
+| `APP_VERBOSITY` | `0` | Niveau de log (0/1/2) |
+
+Ajouter le volume :
+
+| Container path | Host path |
+| --- | --- |
+| `/config` | `/mnt/user/appdata/nabarr` |
+
+> **Note :** Placer le fichier `config.yml` dans `/mnt/user/appdata/nabarr/` avant de démarrer le conteneur.
 
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