Update README.md

Author: andreibondarev

README.md

@@ -32,23 +32,23 @@ If bundler is not being used to manage dependencies, install the gem by executin
 
 1. Generate changes to support vectorsearch in your chosen ActiveRecord model
 
-```
+```bash
 rails generate langchainrb_rails:pgvector --model=Product --llm=openai
 ```
 
 This adds required dependencies to your Gemfile, creates the initializer file `config/initializers/langchainrb_rails.rb`, database migrations to support vectorsearch, and adds the necessary code to the ActiveRecord model to enable vectorsearch.
 
 2. Bundle && Migrate
 
-```
-bundle && rails db:migrate
+```bash
+bundle install && rails db:migrate
 ```
 
 3. Set the env var `OPENAI_API_KEY` to your OpenAI API key.
 
 4. Generate embeddings for your model
 
-```
+```ruby
 [YOUR MODEL].embed!
 ```
 
@@ -58,7 +58,7 @@ This can take a while depending on the number of database records.
 
 ### Question and Answering
 
-```
+```ruby
 Product.ask("list the brands of shoes that are in stock")
 ```
 
@@ -71,7 +71,7 @@ Returns a `String` with a natural language answer. The answer is assembled using
 
 ### Similarity Search
 
-```
+```ruby
 Product.similarity_search("t-shirt")
 ```
 
@@ -83,13 +83,13 @@ Returns ActiveRecord records that most closely match the `query` using Postgres
 
 By default, embeddings are generated by calling the following within your model:
 
-```
+```ruby
 to_json(except: :embedding)
 ```
 
 You can override this by defining an `#as_vector` method in your model:
 
-```
+```ruby
 def as_vector
   res = to_json(except: :embedding, :owner_id, :user_id, :category_id)
   res.merge({ "owner" => owner.name, "user" => user.name, "category" => category.name })
@@ -98,20 +98,20 @@ end
 
 Re-generate embeddings after modifying this method:
 
-```
+```ruby
 [YOUR MODEL].embed!
 ```
 
 ## Rails Generators
 
 ### PgVector Generator
 
-```
+```bash
 rails generate langchainrb_rails:pgvector --model=Product --llm=openai
 ```
 
 ### Pinecone Generator - adds vectorsearch to your ActiveRecord model
-```
+```bash
 rails generate langchainrb_rails:pinecone --model=Product --llm=openai
 ```
 
@@ -125,6 +125,6 @@ Pinecone Generator does the following:
 3. Adds `pinecone` gem to the Gemfile
 
 ### Chroma Generator - adds vectorsearch to your ActiveRecord model
-```
+```bash
 rails generate langchainrb_rails:chroma --model=Product --llm=openai
 ```