[Deployment] Setup fly.io deployment method and update docs (#1028)

Co-authored-by: sidmohanty11 <sidmohanty11@gmail.com>

pyproject.toml

@@ -98,6 +98,7 @@ requests = "^2.31.0"
 openai = ">=1.1.1"
 chromadb = "^0.4.17"
 posthog = "^3.0.2"
+rich = "^13.7.0"
 tiktoken = { version = "^0.4.0", optional = true }
 youtube-transcript-api = { version = "^0.6.1", optional = true }
 beautifulsoup4 = { version = "^4.12.2", optional = true }
@@ -215,3 +216,4 @@ google = ["google-generativeai"]
 [tool.poetry.group.docs.dependencies]
 
 [tool.poetry.scripts]
+ec = "embedchain.cli:cli"