Add inline documentation

References #14

docker-compose.yaml

@@ -1,22 +1,38 @@
+# Specifies the Docker Compose version
 version: "3"
+
+# Defines the services that make up the application
 services:
+  # Defines a service called "db"
   db:
-    build: 
+    # Specifies how to build the Docker image for this service
+    build:
+      # Specifies the build context, which is the directory containing the Dockerfile
       context: db
+      # Specifies the Dockerfile to use for building the image
       dockerfile: Dockerfile
     networks:
+      # Attaches the service to the "book-scraper-network" network
       - book-scraper-network
+    # Specifies the name to use for the container running this service
     container_name: db
-
+
+  # Defines a service called "scraper"
   scraper:
+    # Specifies how to build the Docker image for this service
     build:
+      # Specifies the build context, which is the directory containing the Dockerfile
       context: app
+      # Specifies the Dockerfile to use for building the image
       dockerfile: Dockerfile
     depends_on:
+      # Specifies that this service depends on the "db" service
       - db
     networks:
+      # Attaches the service to the "book-scraper-network" network
       - book-scraper-network
 
+# Defines a network that the services can use to communicate with each other
 networks:
-  book-scraper-network:
-    
+  # Defines a network named "book-scraper-network"
+  book-scraper-network: