Resolve GUI Issues in Docker Build

- 17354aa Install `pyqt` system package in Docker image to get qt dependencies
- 5d3aeba Do not start GUI when Khoj started from Docker
- 26ff66f (Re-)Enable image search via Docker image as image search issues fixed

Resolves #76

Dockerfile

@@ -4,7 +4,7 @@ LABEL org.opencontainers.image.source https://github.com/debanjum/khoj
 
 # Install System Dependencies
 RUN apt-get update -y && \
-    apt-get -y install libimage-exiftool-perl
+    apt-get -y install libimage-exiftool-perl python3-pyqt5
 
 # Copy Application to Container
 COPY . /app

config/khoj_docker.yml

@@ -20,11 +20,11 @@ content-type:
     compressed-jsonl: /data/embeddings/transactions.jsonl.gz
     embeddings-file: /data/embeddings/transaction_embeddings.pt
 
-#  image:
-#    input-directories: ["/data/images/"]
-#    embeddings-file: "/data/embeddings/image_embeddings.pt"
-#    batch-size: 50
-#    use-xmp-metadata: true
+  image:
+    input-directories: ["/data/images/"]
+    embeddings-file: "/data/embeddings/image_embeddings.pt"
+    batch-size: 50
+    use-xmp-metadata: false
 
   music:
     input-files: ["/data/music/music.org"]

docker-compose.yml

@@ -26,4 +26,4 @@ services:
       - ./tests/data/embeddings/:/data/embeddings/
       - ./tests/data/models/:/data/models/
     # Use 0.0.0.0 to explicitly set the host ip for the service on the container. https://pythonspeed.com/articles/docker-connection-refused/
-    command: --host="0.0.0.0" --port=8000 -c=config/khoj_docker.yml -vv
+    command: --no-gui --host="0.0.0.0" --port=8000 -c=config/khoj_docker.yml -vv