chore: update the migration guide

MIGRATION.md

@@ -1,23 +1,84 @@
-# Unraid: Migrate from docker-compose
+# How to migrate
 
 > [!IMPORTANT]  
 > Pre-read all these steps before doing anying, if you are confused open an issue
 
-When using the official Immich docker-compose, the PostgreSQL data is stored in a docker volume which _should_ be located at `/var/lib/docker/volumes/pgdata/_data`. Before preceeding you **must** stop the docker-compose stack.
+## Migrate from docker-compose
 
-## 1. Move the database
+### 1. Move the database
 
 Install `PostgreSQL_Immich` from the Unraid CA and remove these variables from the template: `POSTGRES_USER`, `POSTGRES_PASSWORD`, `POSTGRES_DB`.
 The database is already initialised and these variables don't do anything.
-Also set `Database Storage Path` to `/mnt/user/appdata/PostgreSQL_Immich`.
+Change the `Database Storage Path` to match the `DB_DATA_LOCATION` value
 
-## 2. Setup the `martabal/immich` container
+### 2. Setup the `martabal/immich` container
 
-Instal the unraid CA for <https://github.com/martabal/unraid-templates/blob/main/templates/immich.xml>
+If you use unraid, instal the unraid CA for <https://github.com/martabal/unraid-templates/blob/main/templates/immich.xml>
 
 > [!WARNING]  
 > You must configure the template to the values listed in the docker-compose .env
 
-Ensure that the template matches the `DB_USERNAME`, `DB_PASSWORD`, `DB_DATABASE_NAME` from the .env. Add a new env `IMMICH_MEDIA_LOCATION` and set it to `/usr/src/app/upload`, then set `Path: /photos` to your previous `UPLOAD_LOCATION` path.
+Ensure that the template matches the `DB_USERNAME`, `DB_PASSWORD`, `DB_DATABASE_NAME` from the .env.
 
-Click Apply, Open the WebUI and login. Everything _Should_ be as it was.
+#### If you have uploaded assets after migrating from the docker-compose
+
+Add a new env `IMMICH_MEDIA_LOCATION` and set it to `/usr/src/app/upload`, then set `Path: /photos` to your previous `UPLOAD_LOCATION` path.
+
+```yaml
+services:
+  immich:
+    image: ghcr.io/martabal/immich:latest
+    environment: ...
+      - IMMICH_MEDIA_LOCATION=/usr/src/app/upload
+```
+
+#### If you didn't uploaded assets after migrating from the docker-compose
+
+Add a new volume where the host path is the same as the one mounted to `/photos` and mount it to `/app/immich/server/upload`
+
+```yaml
+services:
+  immich:
+    image: ghcr.io/martabal/immich:latest
+    ...
+    volumes:
+      - path_to_appdata:/config
+      - path_to_photos:/photos
+      - path_to_libraries:/libraries
+      - path_to_photos:/app/immich/server/upload
+```
+
+## Migrate to docker-compose
+
+### 1. Setup
+
+Install the official containers following the official guide [here](https://immich.app/docs/developer/setup/)
+
+### 2. Edit the `.env`
+
+Edit the `DB_USERNAME` and `DB_DATABASE_NAME` environment variables to match the one you had with the `martabal/immich` container:
+
+Change `DB_DATA_LOCATION` and `UPLOAD_LOCATION` to match the previous host volumes:
+
+- `path_to_postgres` &rarr; `DB_DATA_LOCATION`
+- `path_to_photos` &rarr; `UPLOAD_LOCATION`
+
+#### If you have uploaded assets after migrating to the docker-compose
+
+Add a new env `IMMICH_MEDIA_LOCATION=/photos` to your `.env`
+
+#### If you have not uploaded assets after migrating to the docker-compose
+
+Add a new volume to the immich-server container `${UPLOAD_LOCATION}:/photos`
+
+```yaml
+services:
+  immich-server:
+    ...
+    volumes:
+      - ${UPLOAD_LOCATION}:/usr/src/app/upload
+      - /etc/localtime:/etc/localtime:ro
+      - ${UPLOAD_LOCATION}:/photos
+```
+
+Everything _should_ be as it was.