Update docker-compose.yml to build N8N from local context and add Dockerfile for N8N service

- Changed N8N service configuration in docker-compose.yml to build from a local context instead of using the latest image.
- Added a new Dockerfile for the N8N service that installs ffmpeg to enhance functionality.

docker-compose.yml

@@ -17,7 +17,8 @@ volumes:
   weaviate_data:
 
 x-n8n: &service-n8n
-  image: n8nio/n8n:latest
+  build:
+    context: ./n8n
   environment: &service-n8n-env
     DB_TYPE: postgresdb
     DB_POSTGRESDB_HOST: postgres

n8n/Dockerfile

@@ -0,0 +1,5 @@
+FROM n8nio/n8n:latest
+
+USER root
+RUN apt-get update && apt-get install -y ffmpeg && rm -rf /var/lib/apt/lists/*
+USER node