Use Docker secrets (#340)

docs/configuration/configure.md

@@ -46,3 +46,27 @@ Usage via command line :
 ```shell
 OG_LOG_LEVEL=info ./opengist
 ```
+
+### Using Docker Compose secrets
+
+You can use Docker Compose secrets to not expose sensitive information in your compose file, using a `.env` file.
+
+```dotenv
+# file secrets.env
+OG_GITLAB_CLIENT_KEY=your_gitlab_client_key
+OG_GITLAB_SECRET=your_gitlab_secret_key
+```
+
+And then use it in your compose file :
+
+```yml
+services:
+  opengist:
+    # ...
+    secrets:
+      - opengist_secrets
+
+secrets:
+  opengist_secrets:
+    file: ./secrets.env
+```

docs/configuration/databases/mysql.md

@@ -18,8 +18,6 @@ OG_DB_URI=mysql://root:passwd@localhost:3306/opengist_db
 
 ### Docker Compose
 ```yml
-version: "3"
-
 services:
   opengist:
     image: ghcr.io/thomiceli/opengist:1

docs/configuration/databases/postgresql.md

@@ -18,8 +18,6 @@ OG_DB_URI=postgres://postgres:passwd@localhost:5432/opengist_db
 
 ### Docker Compose
 ```yml
-version: "3"
-
 services:
   opengist:
     image: ghcr.io/thomiceli/opengist:1

docs/configuration/databases/sqlite.md

@@ -21,8 +21,6 @@ OG_SQLITE_JOURNAL_MODE=WAL
 
 ### Docker Compose
 ```yml
-version: "3"
-
 services:
   opengist:
     image: ghcr.io/thomiceli/opengist:1