add immich configuration

docker/immich/.env.example

@@ -0,0 +1,17 @@
+# You can find documentation for all the supported env variables at https://immich.app/docs/install/environment-variables
+
+# The location where your uploaded files are stored
+UPLOAD_LOCATION=
+# The location where your database files are stored
+DB_DATA_LOCATION=
+
+# The Immich version to use. You can pin this to a specific version like "v1.71.0"
+IMMICH_VERSION=release
+
+# Connection secret for postgres. You should change it to a random password
+DB_PASSWORD=
+
+# The values below this line do not need to be changed
+###################################################################################
+DB_USERNAME=postgres
+DB_DATABASE_NAME=immich