Adapt docker-compose-gpu.yml to use DPR by default (#1810)

* Adapt docker-compose-gpu.yml to use DPR by default

* Update the comments

* Change the ES image

* Increase the context window and allow no-answers in the DPR pipeline too

* Re-enable file upload in GPU version

* Add env var without value and a commet to explain it

docker-compose-gpu.yml

@@ -1,5 +1,6 @@
 version: "3"
 services:
+
  haystack-api:
  build:
  context: .
@@ -22,19 +23,23 @@ services:
  environment:
  # See rest_api/pipelines.yaml for configurations of Search & Indexing Pipeline.
  - DOCUMENTSTORE_PARAMS_HOST=elasticsearch
+ - PIPELINE_YAML_PATH=/home/user/rest_api/pipeline/pipelines_dpr.yaml
  depends_on:
  - elasticsearch
  command: "/bin/bash -c 'sleep 10 && gunicorn rest_api.application:app -b 0.0.0.0 -k uvicorn.workers.UvicornWorker --workers 1 --timeout 180'"
+
  elasticsearch:
  # This will start an empty elasticsearch instance (so you have to add your documents yourself)
  #image: "elasticsearch:7.9.2"
- # If you want a demo image instead that is "ready-to-query" with some indexed Game of Thrones articles:
- image: "deepset/elasticsearch-game-of-thrones"
+ # If you want a demo image instead that is "ready-to-query" with some indexed articles 
+ # about countries and capital cities from Wikipedia:
+ image: "deepset/elasticsearch-countries-and-capitals"
  ports:
  - 9200:9200
  restart: on-failure
  environment:
  - discovery.type=single-node
+
  ui:
  build:
  context: ui
@@ -46,4 +51,5 @@ services:
  environment:
  - API_ENDPOINT=https://haystack-api:8000
  - EVAL_FILE=eval_labels_example.csv
+ - HAYSTACK_UI_DISABLE_FILE_UPLOAD # docker-compose run -e HAYSTACK_UI_DISABLE_FILE_UPLOAD=1 ...
  command: "/bin/bash -c 'sleep 15 && streamlit run webapp.py'"

docker-compose.yml

@@ -20,8 +20,9 @@ services:
  elasticsearch:
  # This will start an empty elasticsearch instance (so you have to add your documents yourself)
  #image: "elasticsearch:7.9.2"
- # If you want a demo image instead that is "ready-to-query" with some indexed Game of Thrones articles:
- image: "deepset/elasticsearch-game-of-thrones"
+ # If you want a demo image instead that is "ready-to-query" with some indexed articles 
+ # about countries and capital cities from Wikipedia:
+ image: "deepset/elasticsearch-countries-and-capitals"
  ports:
  - 9200:9200
  restart: on-failure

rest_api/pipeline/pipelines_dpr.yaml

@@ -14,6 +14,8 @@ components: # define all the building-blocks for Pipeline
  type: FARMReader # Haystack Class name for the component
  params:
  model_name_or_path: deepset/roberta-base-squad2
+ context_window_size: 1000
+ return_no_answer: true
  - name: TextFileConverter
  type: TextConverter
  - name: PDFFileConverter